SentencingPrior convictions; look-alike drug crimes“Look-alike” drug offenses constitute controlled-substance offenses for sentencing purposes.“The Sentencing Commission frequently makes use of an explicit cross-reference to incorporate one provision or definition into another. See, e.g., U.S.S.G. § 2D1.1 n.3 (drawing the definitions of ‘dangerous weapon’ and ‘firearm’ from the Commentary to U.S.S.G. § 1B1.1); U.S.S.G. § 2D1.1 n.5 ...