This case has a long history. The issue currently before us is whether certain school districts, a special district board, and/or a county commission have standing to challenge Colorado's Taxpayer Bill of Rights ("TABOR"). Colo. Const. art. X, § 20. TABOR allows the people of Colorado to raise or prevent tax increases by popular vote, thereby limiting the power of Colorado's legislative bodies to levy taxes. On a motion to dismiss for lack of subject matter jurisdiction pursuant to Fed. R. Civ. P. 12(b)(1), the district court held that plaintiffs had Article III standing but that they lacked political subdivision standing and prudential standing. Accordingly, the court dismissed the complaint. Plaintiffs appeal.

This case is rife with difficult issues, and we applaud the district court for its attempts to "don waders" and generate some cognizable structure out of the sludge. Nevertheless, we conclude that it could not properly reach its conclusions at this stage of litigation. Because we hold that the political subdivision plaintiffs are not barred by standing requirements, we reverse.

I.

Plaintiffs contend that TABOR denies them a "republican form of government" as guaranteed by Congress in the Colorado Enabling Act, ch. 139, 18 Stat. 474 (1875) ("Enabling Act"), because it takes power from the legislature and puts it into the hands of the people of Colorado in violation of the Guarantee Clause, see U.S. Const. art. IV, § 4, and the Enabling Act as enforced by the Supremacy Clause, see U.S. Const. art. VI, § 2. In one of our prior opinions, we held that certain individual legislator plaintiffs had standing to make this claim and that the claim was not a nonjusticiable political question. See Kerr v. Hickenlooper , 744 F.3d 1156 , 1161 (10th Cir. 2014) (" Kerr I "). On appeal, the Supreme Court vacated and remanded the matter to us for further consideration in light of its opinion in Arizona State Legislature v. Arizona Indep. Redistricting Com'n , --- U.S. ----, 135 S. Ct. 2652 , 192 L.Ed.2d 704 (2015). See Hickenlooper v. Kerr , --- U.S. ----, 135 S. Ct. 2927 , 192 L.Ed.2d 956 (2015).

On remand, we held that the individual legislator plaintiffs lacked standing because they were asserting an institutional injury. Kerr v. Hickenlooper , 824 F.3d 1207 , 1211 (10th Cir. 2016) (" Kerr II "). We instructed the district court to determine whether any other plaintiffs had standing. Back at the district court, plaintiffs amended their complaint to add certain additional entities: eight school boards, the Board of County Commissioners of Boulder County, and a special district board. As noted, the district court thereafter dismissed the complaint.

TABOR prevents the state legislature and local entities from enacting new taxes or raising taxes except by popular vote. Particularly significant to plaintiffs in this case, TABOR prohibits state and local governments from appropriating revenue in excess of the prior year's spending, and it requires the state and local governments to refund taxpayers for revenues appropriated in excess of the prior year's spending. Colo. Const. art. X, § 20 (7)(a) & (d). TABOR also causes plaintiffs to incur costs from presenting matters to voters. Plaintiffs allege that these requirements inhibit them from performing their mandated responsibilities under Colorado law. See, e.g. , Colo. Const. art. XIV. 1

As a condition of admitting Colorado to the Union, Congress required that the state's constitution "shall be republican in form." 18 Stat. 474 . This language mimics the language from the Guarantee Clause of the United States Constitution. See U.S. Const. art. IV, § 4. Under the Supremacy Clause, federal law controls when federal and state law are in conflict with one another. U.S. Const. art. VI, § 2. Plaintiffs contend that TABOR denies them the republican form of government required of the state of Colorado by the Enabling Act and is thus unconstitutional under the Supremacy Clause.

II.

We review the district court's "dismissal for lack of standing de novo, applying the same standard used by the district court." Petrella v. Brownback , 697 F.3d 1285 , 1292 (10th Cir. 2012) (internal quotation marks omitted). "[A]s in all standing inquiries, the critical question is whether at least one petitioner has alleged such a personal stake in the outcome of the controversy as to warrant his invocation of federal-court jurisdiction." Horne v. Flores , 557 U.S. 433 , 445, 129 S.Ct. 2579 , 174 L.Ed.2d 406 (2009) (emphasis in original); see also Watt v. Energy Action Educ. Found. , 454 U.S. 151 , 160, 102 S.Ct. 205 , 70 L.Ed.2d 309 (1981) ; Village of Arlington Heights v. Metro. Hous. Dev. Corp. , 429 U.S. 252 , 264 n.9, 97 S.Ct. 555 , 50 L.Ed.2d 450 (1977). Thus, if at least one plaintiff can demonstrate standing, we need not consider standing for the other plaintiffs. The district court determined that the political subdivision plaintiffs established Article III standing and defendants do not contest this conclusion on appeal. Even so, the district court dismissed the action for lack of subject matter jurisdiction because it concluded that two independent doctrines barred these plaintiffs: political subdivision standing and prudential standing. The issue before us is whether these other limitations indeed preclude the political subdivision plaintiffs from establishing standing.

III.

We begin by determining whether there are "prudential standing" limitations preventing plaintiffs from challenging TABOR. Plaintiffs argue that in light of the Supreme Court's decision in Lexmark Int'l, Inc. v. Static Control Components, Inc. , 572 U.S. 118 , 134 S.Ct. 1377 , 188 L.Ed.2d 392 (2014), the district court erred in examining these prudential concerns on a Rule 12(b)(1) motion to dismiss for lack of subject matter jurisdiction. 2 We agree. In Lexmark , the Supreme Court described the label "prudential standing" as "misleading" and "inapt." 3 See id. at 125, 127 n.3, 134 S.Ct. 1377 . "Although the jurisprudence surrounding standing and jurisdiction has at times been muddled, we have clearly held that prudential standing is not a jurisdictional limitation ...." Niemi v. Lasshofer , 770 F.3d 1331 , 1345 (10th Cir. 2014) (citing Wilderness Soc. v. Kane Cnty ., 632 F.3d 1162 , 1168 n.1 (10th Cir. 2011) (en banc)). Accordingly, the district court should not have evaluated defendant's motion to dismiss for lack of subject matter jurisdiction on the basis of prudential standing. See VR Acquisitions, LLC v. Wasatch Cnty ., 853 F.3d 1142 , 1146 n.4 (10th Cir. 2017).

IV.

Properly situating the prudential standing inquiry does not complete our analysis. The district court also found that, independently of prudential standing concerns, the political subdivision plaintiffs are barred by political subdivision standing restrictions. 4

It is true that political subdivisions generally lack standing to sue their creating state. Housing Authority of Kaw Tribe of Indians of Oklahoma v. City of Ponca City , 952 F.2d 1183 , 1188 (10th Cir. 1991). But "the Supreme Court and courts of appeals have shied away from erecting an absolute bar." City of Hugo v. Nichols , 656 F.3d 1251 , 1256 (10th Cir. 2011). In certain circumstances we have held that political subdivisions have standing, and two cases guide our analysis: City of Hugo, and Branson v. Romer , 161 F.3d 619 (10th Cir. 1998). The district court and plaintiffs differ in their interpretations of the scope of these holdings. 5 Because we conclude that under either proffered formulation the district court erred in dismissing these claims on a Rule 12(b)(1) motion, we need not determine the precise reach of these precedents.

Plaintiffs assert the essence of City of Hugo and Branson is that "a political subdivision has standing to bring a constitutional claim against its creating state when the substance of its claim relies on the Supremacy Clause and a putatively controlling federal law." Branson , 161 F.3d at 628 . They identify the dispositive question as whether the right sought to be vindicated was "written to protect individual rights, as opposed to collective or structural rights." Id. Arguing that the political subdivision plaintiffs here, like those in Branson , seek to vindicate federal rights that are statutory, structural and collective rather than constitutional, individual and contractual, they urge the conclusion that as in Branson the political subdivision plaintiffs here have standing. The government does not contest that employing this interpretation of our precedents casts the present political subdivision plaintiffs under the precedential force of Branson rather than City of Hugo . Therefore, if this interpretation of our case law is to be applied, these plaintiffs are not barred by political subdivision standing considerations.

Alternatively, the district court, the government, and the dissent all read City of Hugo as requiring that "the federal statute being enforced must be 'directed at protecting political subdivisions.' " 6

Kerr v. Hickenlooper , 259 F. Supp. 3d 1178 , 1188 (D. Colo. 2017) (" Kerr ") (citing City of Hugo , 656 F.3d at 1257 ). Scrutinizing plaintiffs' assertion that "the political-subdivision plaintiffs are seeking to enforce rights granted to them in the Enabling Act," id. at 1188, the district court countered that the Enabling Act's requirement that the Colorado constitution be "republican in form" was not designed for such plaintiffs. Instead, the district court concluded that nearby language in the Enabling Act revealed the requirement of "republican in form" as being granted to "the people of Colorado." Id. at 1191 (emphasis added). It surmised that the political subdivision plaintiffs had been granted no statutory rights to vindicate this interest, and that they were accordingly barred by political subdivision standing.

But we cannot decisively determine if the political subdivision plaintiffs here are excepted from the usual bar to political subdivision standing because doing so would require impermissibly delving into the merits of the case. Establishing who was intended to benefit from the Enabling Act's "republican in form" requirement necessarily begs the question of what a "Republican Form of Government" is, which is the issue ultimately to be resolved if any court ever succeeds in reaching the merits of this case. See Largess v. Supreme Judicial Court for State of Massachusetts , 373 F.3d 219 , 226 (1st Cir. 2004) (proceeding to merits to review scope and meaning of "Republican Form of Government"). Even the district court modulated its conclusion that "republican in form" does not extend rights to the political subdivision plaintiffs by stating that it so finds "based on the present record." Kerr , 259 F. Supp. 3d at 1190-91 . But the present record is insufficient to support this determination.

Throughout their various pleadings, plaintiffs maintain that a "Republican Form of Government" extends protections directly to these political subdivision plaintiffs that TABOR unconstitutionally intrudes upon. They offer several hooks hinting at their arguments on the merits of the case, including the observations that the Enabling Act recognized the existence of both counties and public schools prior to Colorado's statehood, and that the constitution Colorado adopted pursuant to the Enabling Act embodied an interdependent structure between the state and its existing political subdivisions. See Aplt. Reply Br. at 21 n.13. 7 Notably, plaintiffs allege that a "fully effective legislature is an essential component of a Republican Form of Government," and that the TABOR Amendment's substantial interference with the Colorado General Assembly's taxing power "renders [it] unable to fulfill its legislative obligations .... [and] similarly undermines the Republican Form of Government for all subordinate levels of government in the state." Aplt. App. at 1447 (Complaint at ¶108). They further argue that a "Republican Form of Government" necessarily extends to each lower level of government because acceptance of the contrary would beget complete evasion of this requirement through the delegation of powers to subordinate levels of government that were not equally "republican in form." Id. at 1424 (Complaint at ¶11). Plaintiffs have informed us that their case on the merits "will offer extensive historical evidence of and legal proof for the proper meaning of the Guarantee Clause and 'Republican Form of Government.' " Aplt. Reply Br. at 25 n.15.

In response, both the government and the district court valiantly struggle to conclusively establish that the political subdivision plaintiffs are not the beneficiaries of a "Republican Form of Government." They extend various conjectural standards in doing so, including that the constitutional guarantee of a republican form of government is a guarantee to the state that does not extend to individuals, Aple. Br. at 20, 8 and that this guarantee is to the people of the state, Kerr , 259 F.Supp. 3d at 1191 . Citing a variety of reasons, the district court declared it "does not believe" that the requirement of a Constitution "republican in form" stretches to the political-subdivision plaintiffs. But each proposed rationale is insufficient to extricate the standing inquiry from the case on the merits, which is not presently before us on this appeal from the grant of a motion to dismiss for lack of subject matter jurisdiction under Rule 12(b)(1). See Initiative & Referendum Inst. v. Walker , 450 F.3d 1082 , 1088 (10th Cir. 2006) (en banc) ("For purposes of the standing inquiry, the question is not whether the alleged injury rises to the level of a constitutional violation. That is the issue on the merits. For standing purposes, we ask only if there was an injury in fact, caused by the challenged action and redressable in court."), cert. denied , 549 U.S. 1245 , 127 S.Ct. 1254 , 167 L.Ed.2d 145 (2007) ; Day v. Bond , 500 F.3d 1127 , 1137 (10th Cir. 2007) (" 'For purposes of standing,' we noted [in Walker ], 'the question cannot be whether the Constitution, properly interpreted, extends protection to the plaintiff's asserted right or interest,' because that would be a determination of the merits of the plaintiffs' claim under the guise of an evaluation of their standing.").

The district court forged on, concluding that "the political subdivision plaintiffs cannot be seeking to enforce a right to a Constitution 'republican in form' because they have no such right" and it "is not their injury to assert." Kerr , 259 F. Supp. 3d at 1191, 1192 . This conclusion is problematic for two reasons: first, to some extent it contradicts the court's earlier finding that the political subdivision plaintiffs have personally suffered a concrete injury directly at the hand of TABOR; second, and more importantly, this is now dabbling in the merits of this case. Granted, we have previously explained that "the term 'legally protected interest' must do some work in the standing analysis ... [and] has independent force and meaning, without any need to open the door to merits considerations at the jurisdictional stage." Walker , 450 F.3d at 1093 . We have not explained what that independent force and meaning are but, in any event, the present case falls nowhere near the illustrative list of situations we provided in which an asserted "legally protected interest" is not recognized. 9

The district court cited Day to try to unwind the merits from the jurisdictional issue, stating that the standing issue of whether political subdivision plaintiffs "are enforcing rights granted to them by the Enabling Act" is "a completely different inquiry to whether a Republican form of government has been undermined by TABOR." Kerr , 259 F. Supp. 3d at 1192 . But the distinction between these two inquiries dissolves when traced back to the root question: both inquires require first determining the meaning and purpose of the phrase "republican in form." The standing question and merit question here are not two separate and independent issues, analogous to Day , but are instead comparable to Walker : the merits of the plaintiffs' claims mirror the standing inquiry as it is framed by the district court. See Day , 500 F.3d at 1138 . "[T]he circumstances of this case present a rare instance in which the standing issue is intertwined and inseparable from the merits of the underlying claim." Largess , 373 F.3d at 224 ; see also Paper, Allied-Indus., Chem. And Energy Workers Int'l Union v. Cont'l Carbon Co. , 428 F.3d 1285 , 1292 (10th Cir. 2005) ("The underlying issue in determining whether the jurisdictional question is intertwined with the merits is whether resolution of the jurisdictional question requires resolution of an aspect of the substantive claim.") (internal brackets and citation omitted); Sizova v. Nat. Inst. of Standards & Tech. , 282 F.3d 1320 , 1324 (10th Cir. 2002) ("[S]ubject matter jurisdiction and the merits are considered to be intertwined when subject matter jurisdiction is dependent upon the same statute which provides the substantive claim in the case.") (internal brackets, quotation mark, and citation omitted); 10 cf. Kennan, supra note 4 (arguing that questions of whether political subdivisions should be barred from bringing suit because it would impede state sovereignty can only be determined by addressing the merits of the subdivision's claims that state action violates the Supremacy Clause).

The various conclusions the district court and parties draw regarding "republican in form" are not of most interest to our analysis. Rather, it is the attempt itself which betrays the fundamental hitch-that these standing arguments turn on the merits of plaintiffs' claims, namely the meaning, scope, and intended beneficiaries of the Enabling Act's requirement that Colorado's constitution be "republican in form." See Aplt. Reply Br. at 24. We are not commenting on the validity or weight of any of these arguments but merely highlighting the degree of uncertainty present at this stage. See Schramm v. Oakes , 352 F.2d 143 , 149 (10th Cir. 1965) (holding standing inquiry to be intertwined with the merits because "[b]ased then on what we have, we are unable to say with any degree of legal certainty that the appellants could not make out a valid cause of action"). The merits of these issues were not presented to the district court and are not before us. We thus cannot say with confidence what is entailed by the Enabling Act's requirement for a government "republican in form," and neither can we say with confidence what is not.

This uncertainty is particularly apparent when we examine the paucity of jurisprudence concerning the scope and meaning of guarantees to a "Republican Form of Government." As tellingly described by the First Circuit,

scholars have interpreted this [republican form of government] portion of the Guarantee Clause in numerous, often conflicting, ways. And John Adams himself, twenty years after ratification of the Constitution, confessed that he "never understood" what the Guarantee Clause meant and that he "believ[ed] no man ever did or ever will."

Largess , 373 F.3d at 226-27 (citations omitted); see also Aplt. Reply Br. at 16 n.7 (citing Minor v. Happersett, 88 U.S. (21 Wall.) 162, 175-77, 22 L.Ed. 627 (1874) ). There can be no doubt that disentangling these answers will be an immense task; however, this is not a task to be undertaken on a Rule 12(b)(1) motion such as this.

We sympathize with the reality that "standing doctrine sometimes has a frustratingly metaphysical quality." Walker , 450 F.3d at 1097 . But "a federal court's obligation to hear and decide cases within its jurisdiction is virtually unflagging." Lexmark Int'l, Inc. , 572 U.S. at 126 , 134 S.Ct. 1377 ; see also Odom v. Penske Truck Leasing Co., L.P. , 893 F.3d 739 , 743 (10th Cir. 2018) (citing Lexmark to construe prudential restraints narrowly). Irrespective of whether or not a republican form of government is eventually found to be guaranteed to these particular plaintiffs, the district court cannot properly reach this issue as a jurisdictional matter. Because these political subdivision plaintiffs have Article III standing and cannot be irrefutably barred by alternative standing doctrines, the district court should not have dismissed the complaint for a lack of subject matter jurisdiction.

We REVERSE and REMAND to the district court for further proceedings.

I respectfully dissent. Unlike the majority, I would affirm the district court's judgment based on the political-subdivision standing doctrine. For the political-subdivision plaintiffs ("Plaintiffs") to have standing, our decision in City of Hugo v. Nichols , 656 F.3d 1251 (10th Cir. 2011), requires that they seek to enforce a federal statute directed at protecting or specifically providing rights to political subdivisions (sometimes referred to collectively herein as the "directed at protecting" requirement). The district court ruled against them on this dispositive issue, and their argument challenging that ruling is so meager as to constitute waiver. Moreover, their argument-insofar as I am able to piece it together-also fails on the merits. The majority truncates its analysis before reaching these issues, ruling that doing so would require "impermissibly delving into the merits of the case." Maj. Op. at 1204. However, our prior cases counsel that a court must consider those issues in answering the threshold question of standing and that it may do so without impermissibly implicating the merits. Accordingly, I respectfully dissent.

As we observed in Branson School District RE-82 v. Romer , 161 F.3d 619 (10th Cir. 1998), it is "well-settled" in this circuit that a political subdivision "may not bring a federal suit against its parent state" on the basis of certain constitutional provisions. Id. at 628 . However, Branson also described limitations on this bar: notably, it suggested that the bar applies only "when the constitutional provision that supplies the basis for the complaint was written to protect individual rights, as opposed to collective or structural rights." Id. In particular, the Branson court was unable to locate any Supreme Court decision barring a subdivision from asserting "the structural protections of the Supremacy Clause ... against its creating state." Id. at 629 .

The political-subdivision plaintiffs in Branson (Colorado school districts) brought just such a viable challenge, primarily to state constitutional changes modifying the terms under which a state land board would manage its holdings. Id. at 627 . Specifically, the land board was no longer required to manage its holdings to secure the "maximum possible amount" for a public school fund; rather, the board was simply required to manage its holdings to "produce reasonable and consistent income over time." Id. The plaintiffs challenged these changes "under the Supremacy Clause and the Colorado Enabling Act," and the Branson court concluded that the challenge could proceed. Id. at 629 ; see also id. at 630 ("[O]ur holding simply allows a political subdivision to sue its parent state when the suit alleges a violation by the state of some controlling federal law. The Supremacy Clause guarantees no less."). In reaching this conclusion, Branson noted that the plaintiffs were both "substantially independent" of the state of Colorado and, "[m]ost importantly," they were " 'essentially' the beneficiaries of the federal trust at issue." Id. at 629 . That is, the Enabling Act had granted millions of acres of "school lands" to the State of Colorado for "the support of the 'common schools,' " and "[t]oday's public school districts are the direct political descendants of those 19th Century 'common schools.' " Id.

Nearly thirteen years later, our court decided City of Hugo . There, we observed that the Supremacy Clause is not itself the source of any federal rights; instead, it secures federally protected rights when they conflict with state law. 656 F.3d at 1256 . As such, "a plaintiff alleging a Supremacy Clause claim is actually alleging a right under some other federal law, which trumps a contrary state law by operation of the Supremacy Clause." Id. After summarizing our case law regarding political-subdivision standing (including Branson ), City of Hugo was unable to find "a single case in which the Supreme Court or a court of appeals has allowed a political subdivision to sue its parent state under a substantive provision of the Constitution." Id. at 1257 . "Instead, courts have allowed such suits only when Congress has enacted statutory law specifically providing rights to municipalities." Id. (emphasis added); see also id. (harmonizing prior cases finding standing and observing that, in those cases, "the source of substantive rights was a federal statute directed at protecting political subdivisions , and the Supremacy Clause was invoked merely to guarantee, as a structural matter, that federal law predominates over conflicting state law" (emphasis added)). Because the claims in City of Hugo were based on a substantive provision of the Constitution, i.e., the dormant Commerce Clause, and because "the Constitution does not contemplate the rights of political subdivisions as against their parent states," standing was lacking. Id. at 1257-58 .

Here, political subdivisions of the State of Colorado challenge Colorado's Taxpayer Bill of Rights ("TABOR") under the Colorado Enabling Act and the Supremacy Clause, contending that TABOR contradicts the Enabling Act's requirement that Colorado maintain a "republican form of government." 1 See Aplts.' App., Vol. XII, at 1424, 1426, 1448 (Fourth Am. Compl., filed Dec. 6, 2016). The district court analyzed the case under Branson and City of Hugo , ruling that the Plaintiffs did not establish that they were seeking to enforce "any rights granted to them under the Enabling Act." Id. at 1575-84 (Op. & Order, dated May 4, 2017); see id. at 1578 (" City of Hugo explains that the federal statute being enforced must be 'directed at protecting political subdivisions.' " (quoting City of Hugo , 656 F.3d at 1257 )). The district court reviewed several paragraphs of the Fourth Amended Complaint that the Plaintiffs had cited, concluding that most of these paragraphs simply made "no mention of rights being granted in the Enabling Act to the [Plaintiffs]." Id. at 1579.

In the district court's view, the Fourth Amended Complaint's only "potentially relevant paragraphs" were Paragraphs 30 and 34. Id. at 1580. Paragraph 30 contended that the Enabling Act required "use of, and revenue from, the federal lands ceded to the State upon admission as a state to be dedicated to 'the support of common schools' (Section 7), 'support of a State university' (Section 10), and 'the two sections of land in each township herein granted for the support of common schools ... the proceeds to constitute a permanent school-fund, the interest of which to be expended in the support of common schools' (Section 14)." Id. at 1430 (omission in original). And, according to Paragraph 34, TABOR prevents "the State and its local school districts from fulfilling their obligations, derived from the original state constitution, and its derivation from the Enabling Act, adequately to fund the public schools of the State." Id. at 1431.

The district court concluded that these allegations were insufficient to establish standing. Preliminarily, the district court ruled that none of these provisions provided any succor to Plaintiffs not associated with public schools, i.e., boards of county commissioners or special districts. See id. at 1580. It also observed that the briefing on this issue was limited, and that the Plaintiffs "ma[d]e no effort" to explain how the cited paragraphs of the Fourth Amended Complaint, and the authorities therein, gave rise to standing. Id. Moreover, the district court rejected the Plaintiffs' reliance on Section 10 of the Colorado Enabling Act because none of them are state universities, and it rejected the Plaintiffs' allegations concerning Sections 7 and 14 of the Enabling Act as inapposite. See id. at 1581-82. That is, while Sections 7 and 14 concern "support of common schools," they do not implicate the right to a "republican form of government" sought to be enforced here; in other words, unlike the suit brought in Branson , this suit does not directly concern the land-trust and funding issues addressed by these provisions of the Enabling Act. See id. The district court also observed that, although the Enabling Act does expressly contemplate a state constitution that is "republican in form," the Enabling Act counsels that such a constitution is for "the people of [Colorado]," see 18 Stat. 474 §§ 4 -5 (1875), with no specific mention of political subdivisions. Aplts.' App., Vol. XII, at 1583.

On appeal, the Plaintiffs contend that their suit passes muster under Branson , and indeed is more like that case than like City of Hugo , because they seek to vindicate structural rights, not individual ones. Aplts.' Opening Br. at 23. In a footnote, they argue that the district court impermissibly "stretched" dicta in Branson (not City of Hugo ) to require that they sue to enforce a statute "directed at protecting political subdivisions." Id. at 26 n.13. They also contend that City of Hugo is distinguishable because the claim in City of Hugo was "an 'individual' claim under the terminology of Branson " and that their claim is distinct from that in City of Hugo because their claim relies on a federal statute (the Enabling Act), rather than a substantive constitutional provision. Id. at 23, 28-30.

I would reject any argument that City of Hugo is inapplicable. While it is true that City of Hugo directly addressed enforcement of the dormant Commerce Clause, City of Hugo expressly distinguished that claim from one where "the source of substantive rights was a federal statute directed at protecting " or " specifically providing rights to " political subdivisions, and, critically, it observed that our cases (and, indeed, all the Supreme Court and court of appeals cases it could find) have allowed political-subdivision standing only in the presence of the latter showing. See 656 F.3d at 1257 (emphases added). City of Hugo also opined that " Branson simply cannot be read to embrace the notion that use of the terms 'collective' and 'structural' meant to refer to anything other than the situation where a political subdivision has brought suit against its parent to vindicate substantive federal statutory rights through the Supremacy Clause." Id. at 1262 . Thus, our most recent comprehensive exploration of this issue, City of Hugo , requires a political-subdivision plaintiff's "structural" claim to be undergirded by a statute providing it with rights to enforce.

Because City of Hugo applies, the Plaintiffs must seek to enforce a federal statute "directed at protecting political subdivisions" or "specifically providing rights to" them. Id. at 1257 . Having trained its attention on distinguishing City of Hugo , however, the Opening Brief makes virtually no argument that this "directed at protecting" requirement is satisfied. Instead, the Opening Brief generally reiterates the nature of the Plaintiffs' claims, i.e., they "allege that TABOR violates the provision of the Enabling Act requiring a republican form of government, and that such violation is actionable against the state under the Supremacy Clause," Aplts.' Opening Br. at 24, and they "seek to enforce a claim under the Enabling Act: the right to a republican form of government," id. at 28. In connection with these cursory arguments, the Plaintiffs cite essentially the same paragraphs of the Fourth Amended Complaint that the district court found unavailing; yet, significantly, they offer no explanation as to why the district court's analysis of the legal import of these paragraphs was wrong. See id. at 24, 28. In light of this limited argument, I would deem the issue waived. See, e.g. , United States v. Cooper , 654 F.3d 1104 , 1128 (10th Cir. 2011) (citing "well-settled" principle that "[a]rguments inadequately briefed in the opening brief are waived" (quoting Adler v. Wal-Mart Stores, Inc. , 144 F.3d 664 , 679 (10th Cir. 1998) )); see also Reedy v. Werholtz , 660 F.3d 1270 , 1275 (10th Cir. 2011) ("The argument section of Plaintiffs' opening brief does not challenge the court's reasoning on this point. We therefore do not address the matter.").

In any event, the limited argument that I can discern is unavailing. It seems that, in the Plaintiffs' view, Branson establishes that political-subdivision standing is broadly available for claims under the Enabling Act, and they are simply following the trail blazed in that case: "Here, as in the Branson litigation, the [Plaintiffs] claim the protections afforded under a federal statute, the Enabling Act, which imposes the structural requirement that Colorado's government be 'republican in form.' " Aplts.' Opening Br. at 24; see also id. at 27 ("That same Enabling Act conditioned Colorado's admission into the Union upon its enactment of a constitution that was 'republican in form.' "). But the Plaintiffs elide a key distinction relied upon by the district court and consistent with both Branson and City of Hugo : the issues in Branson directly implicated specific provisions of the Enabling Act providing lands "for the support of the 'common schools,' " of which the school-district plaintiffs were "direct political descendants." 161 F.3d at 629 . Indeed, Branson deemed it "[m]ost important[ ]" that the school districts were "essentially" the beneficiaries of the land trust that had been affected by state constitutional changes. Id. Here, in contrast and as the district court correctly observed, there is no similarly close link between the "republican form of government" that the Plaintiffs claim TABOR

contravenes and the land-management and funding issues addressed in the provisions of the Enabling Act that the Plaintiffs cited in their Fourth Amendment Complaint and continue to rely on. See Aplts.' App., Vol. XII, at 1581-82. I also agree with the district court that, to the extent that the Enabling Act expressly requires a republican form of government, it does not suggest that the requirement is directed at protecting or specifically providing rights to Colorado's political subdivisions. Id. at 1582-83.

Our political-subdivision standing cases require a plaintiff to show that its claims are undergirded by a federal statute directed at protecting or providing rights to it. The Plaintiffs have not satisfied this standard; indeed, they present very limited argument on this issue and make only feeble challenges to the district court's ruling. Because the political-subdivision standing bar is an independent jurisdictional bar, I would affirm the district court's ruling solely on this basis. Cf. Sinochem Int'l Co. v. Malaysia Int'l Shipping Corp. , 549 U.S. 422 , 425, 127 S.Ct. 1184 , 167 L.Ed.2d 15 (2007) (holding that federal court could dismiss case on forum non conveniens grounds without conclusively deciding issues of subject-matter jurisdiction).

The majority makes a different determination, opining that the district court "could not properly reach its conclusions at this stage of litigation." Maj. Op. at 1192. Before I discuss my reasons for diverging from the majority's views, I note several issues which are left unresolved by the majority's opinion. First, although the majority evinces some uncertainty as to whether political-subdivision standing is properly considered a type of "prudential standing"-notably, intimating that Lexmark International, Inc. v. Static Control Components, Inc. , 572 U.S. 118 , 134 S.Ct. 1377 , 188 L.Ed.2d 392 (2014), may have put in doubt on whether this form of standing is a jurisdictional bar, see Maj. Op. at 1194-95 n.4, 1195-96 n.6-the majority ultimately follows our prior cases that treat political-subdivision standing as a jurisdictional matter, and it thus analyzes political-subdivision standing entirely separately from prudential standing. See City of Hugo , 656 F.3d at 1255 n.4 (observing that Branson "casts the matter [of political-subdivision standing] as one of jurisdictional standing"). Second, although the majority voices concerns about the contours and workability of applying the "directed at protecting" component of City of Hugo , it expressly declines to "resolve" these concerns (albeit while citing them as "supplementary support" for its result). Maj. Op. at 1195 n.6. Third, it declines to determine the "precise reach" of Branson and City of Hugo or choose definitively between the differing readings offered by the Plaintiffs and the district court because, in its view, "under either proffered formulation the district court erred." Id. at 1195.

Instead, the crux of the majority's analysis is that "[e]stablishing who was intended to benefit from the Enabling Act's 'republican in form' requirement necessarily begs the question of what a 'Republican Form of Government' is, which is the issue ultimately to be resolved if any court ever succeeds in reaching the merits of this case." Id. at 1196. In other words, in the majority's view, grappling with the "directed at protecting" component of City of Hugo would require "impermissibly delving into the merits of the case." Id. at 1196.

I part ways with the majority here. Our cases do generally emphasize the importance of distinguishing between the standing inquiry and merits issues, with the latter including the elements of a claim and whether that claim has been successfully stated. See id. at 1198-99; see also, e.g. , Day v. Bond , 500 F.3d 1127 , 1137 (10th Cir. 2007) (" 'For purposes of standing,' ... 'the question cannot be whether the Constitution, properly interpreted, extends protection to the plaintiff's asserted right or interest,' because that would be a determination of the merits of the plaintiffs' claim under the guise of an evaluation of their standing." (quoting Initiative & Referendum Inst. v. Walker , 450 F.3d 1082 , 1092 (10th Cir. 2006) (en banc))). However, the cases the majority relies on do not involve the political-subdivision standing doctrine or the embedded "directed at protecting" requirement. In that context, as I have set forth supra , City of Hugo is our primary guidepost. That case reiterates that political-subdivision standing is jurisdictional, see 656 F.3d at 1255 n.4, and requires a political-subdivision plaintiff to show-as part of a threshold jurisdictional standing inquiry-that it seeks enforcement of a federal statute directed at protecting or specifically providing rights to political subdivisions like it, id. at 1257 . Thus, in analyzing standing in this specific context, City of Hugo requires a federal court to analyze the nature of the claim or rights at issue, at least as far as is necessary to determine who may seek to enforce them. Irrespective of whether this may sometimes resemble a merits analysis, it is precisely what City of Hugo contemplates.

I note further that falling back on Branson is of no avail to the majority's position: although a "directed at protecting" requirement is not clearly stated in that case, Branson still considered and ultimately found "[m]ost important[ ]" to its analysis the fact that the plaintiffs were " 'essentially' the beneficiaries of the federal trust at issue." 161 F.3d at 629 . Thus, our precedent certainly permits, and in my view requires, a court to determine a federal statute's beneficiaries as part of its standing analysis and contemplates that a court may make such a determination without impermissibly implicating the merits. I respectfully submit that the majority, in concluding otherwise, fails to correctly apply this precedent. Nor does the majority attempt to persuasively distinguish this precedent, much less demonstrate that it has been superseded by subsequent Supreme Court authority. 2

Much of the majority's disquiet seems to be based on a perceived lack of "workable standards" and its view that "disentangling" the meaning of "republican form of government" will be an "immense task" not amenable to resolution in the context of a Rule 12(b)(1) motion. Maj. Op. at 1195-96 n.6, 1199-1200; see also id. at 1196-97 (stating that these issues cannot be resolved on "the present record" and that the Plaintiffs' briefing "hint[s] at" complex merits arguments concerning the meaning of this phrase); id. at 1196-97 (suggesting that the district court and the State "valiantly struggle to conclusively establish" that the Plaintiffs are not beneficiaries of a "republican form of government"); id. at 1197 (citing "the degree of uncertainty present at this stage"). I disagree: as I observed supra , the Plaintiffs have made virtually no argument at this stage that, if a "directed at protecting"

requirement applies, it is satisfied. See also id. at 1199 (appearing to acknowledge that arguments concerning the "meaning, scope, and intended beneficiaries" of the "republican in form" requirement "were not presented to the district court and are not before us"). Our political-subdivision standing cases and general standing principles both counsel that it is the Plaintiffs' burden to satisfy this standard. See, e.g. , Utah Ass'n of Ctys. v. Bush , 455 F.3d 1094 , 1100 (10th Cir. 2006) (observing that party seeking to invoke jurisdiction must establish standing).

Additionally, complexity alone does not permit a court to forestall the full evaluation of jurisdictional issues. Earlier in this litigation, a panel evaluated the "justiciability hurdle" of the political-question doctrine under a six-factor test, evaluating at length, for example, whether the federal constitutional guarantee of a "republican form of government" is textually committed to another branch, whether judicially discoverable and manageable standards exist for interpreting that guarantee, and whether evaluating the issue requires making policy determinations. Kerr v. Hickenlooper , 744 F.3d 1156 , 1172, 1176-81 (10th Cir. 2014), cert. granted , judgment vacated on other grounds , --- U.S. ----, 135 S. Ct. 2927 , 192 L.Ed.2d 956 (2015) ; see also Morgan v. McCotter , 365 F.3d 882 , 887 (10th Cir. 2004) (observing that "the question of justiciability implicates this court's jurisdiction"). And it did so with special attention to not "reaching or considering the merits." See Kerr , 744 F.3d at 1179 . I see no reason why-if required-a similarly searching analysis might not be undertaken in this context, and similarly fine distinctions might not ultimately be drawn between standing and merits issues, in evaluating whom the Enabling Act's requirement of a republican form of government was directed at protecting or specifically providing rights to.

To be sure, there may be conceivable arguments for reevaluating or cabining our political-subdivision standing doctrine. But the majority does not meaningfully grapple with those arguments here, let alone expressly adopt them. Instead, the majority purports to accept the jurisdictional, decisional rubric laid out in our political-subdivision standing cases but then effectively departs entirely from the requirements of that rubric in resolving this case. I cannot travel this path.

Therefore, for the foregoing reasons, I respectfully dissent.