Federal law prohibits any “unlawful user” of marijuana from possessing a firearm. “Unlawful user” is unconstitutionally vague, says criminal defendant who admits to smoking daily for the past decade. Perhaps in some hypothetical scenarios, says Seventh Circuit, but your conduct “undoubtedly falls within the obvious core” of the statute. As a consolation prize, however, the court “commend[s] everyone involved in the briefing and arguing of this case” (along with the district-court judges) for a job well done.