The reason legal pot won't be turned around is simple: once the $$ starts flowing, its impossible to turn off.  There are honest-to-god capitalists making money with legal pot.  A (not black) market has been created.  The industry employs electricians, builders, security, and pot heads.  Pot heads buy salty snacks from the convenience store.  Yo!! Jeff and your GOP buddies, every HO be making money.  You want to undo that or do you want a campaign contribution?