How serious must a state court drug conviction be to support an enhanced federal sentence

In this published opinion issued today, which identifies the defendant as "BASEEM SHAKIR WILLIAMS, a/k/a Gregory Burgess, a/k/a Donnell Conklin, a/k/a Warren Kennedy," a panel of the Fourth Circuit issued with the question of what is a "serious drug offense" for purposes of sentence enhancement. The opinion was written by Judge Robert R. Beezer, a senior status judge from the Ninth Circuit, sitting by designation (and also a double Wahoo).