Pot is being legalized because democrats are appealing to their base. Pot smoking is rampant in black communities. Of course there are successful people who pay their bills and smoke recreationally - but in poorer communities it is a daily thing - money going to pot instead of to homes or bills or even food. Young men who have grown up hiding from any need to succeed by getting high every day - and while it isn’t addictive in the sense of heroin or even alcohol, it becomes an escape from their lives and responsibilities and obama is encouraging that behavior by condoning it.
So, without liberalizing pot laws, the black community might not vote for Democrats?
Pot is being legalized because it is wasteful and foolish to spend the effort we do to (attempt to) prohibit it.