Abel Garcia-Ochoa appeals the revocation of his supervised release and the sentence imposed following his guilty plea to illegal reentry. We affirm.

Even if we assume arguendo that the district court violated Fed.R.CrimP. 32 in failing to allow Garcia the right of allocution at his revocation hearing, his claim fails because he cannot show plain error. See United States v. Reyna, 358 F.3d 344, 353 (5th Cir.) (en banc), cert. denied, 541 U.S. 1065, 124 S.Ct. 2390, 158 L.Ed.2d 966 (2004). The record reveals that Garcia was sentenced at the bottom of the Guideline range applicable to the revocation of his supervised release, and it does not reveal that there were disputed facts, which, if resolved in Garcia’s favor, would have reduced his sentence. See id. Garcia therefore cannot show that the alleged error affected his substantial rights. See id.

Garcia correctly concedes that his constitutional challenge to 8 U.S.C. § 1326(b) is foreclosed, and he raises it only to preserve its further review by the Supreme Court. See Almendarez-Torres v. United States, 523 U.S. 224, 247, 118 S.Ct. 1219, 140 L.Ed.2d 350 (1998); United States v. Dabeit, 231 F.3d 979, 984 (5th Cir. 2000).

Finally, Garcia’s claim, raised for the first time on appeal, that he is entitled to resentencing because he was sentenced under the mandatory Guideline regime held unconstitutional in United States v. Booker, — U.S.-, 125 S.Ct. 738, 160 L.Ed.2d 621 (2005), does not survive plain error review. See United States v. Martinez-Lugo, 411 F.3d 597, 600 (5th Cir. 2005). The district court sentenced Garcia to the middle of the applicable Guideline range, implicitly rejecting the arguments made in mitigation. Garcia has therefore not shown that the error affected the outcome of his illegal reentry sentencing, and he has thus not carried his burden of showing that the error affected his substantial rights. Id.

AFFIRMED.