Attorney General Eric Holder says he will "vigorously enforce" federal marijuana laws in California if Prop 19 passes, and he's taking a lot of well-deserved heat for it. To even suggest that he could somehow bust every pot-smoker in California is just ridiculous on its face, and reeks of desperate last-minute political manipulation. But after watching this event unfold and reading the statement itself, I'm less concerned about federal interference with Prop 19 than ever before.