Justice Department Updates Marijuana Enforcement Policy

"These schemes must be tough in practice, not just on paper, and include strong, state-based enforcement efforts, backed by adequate funding."

Ah. There it is. That's what they're really worried about, if the "war on drugs" somehow comes to an end, or is dramatically reduced, by legalizing marijuana. They're worried that law enforcement agencies won't get as big budgets anymore, so they're now strongly "encouraging" states to keep the money flowing to them, but this time for "regulatory enforcement", instead of just catching them and throwing them in jail.