United States v. Thomas, 361 F.3d 653 (D.C. Cir. 2004) (District of Columbia conviction constitutes a conviction "under federal or state law" for purposes of enhancing a federal sentence); see United States v. Torres-Rosa, 209 F.3d 4 (1st Cir. 2000); United States v. Morales-Diaz, 925 F.2d 535 (1st Cir. 1991).