Whether the meaning of the term 'controlled substance' in the Sentencing Guidelines includes any substance prohibited by state law, or instead only those substances controlled by federal law — and if the meaning of 'controlled substance' is ambiguous, whether the rule of lenity requires a 'grievous ambiguity' before it is strictly construed against the government?

QUESTIONS PRESENTED Whether the meaning of the term “controlled substance” in the Sentencing Guidelines includes any substance prohibited by state law, or instead only those substances controlled by federal law — and if the meaning of “controlled substance” is ambiguous, whether the rule of lenity requires a “grievous ambiguity” before it is strictly construed against the government? i