Although there is much table pounding and foot stomping by some legislators from states where reefer use is allowed, these folks don't understand how the Congress took a hands off stance concerning any form of legalization during the Obama administration.
I think most of them do. Last night, somebody interviewed John Hickenlooper, Colorado's Democratic governor. He is, of course, pro-pot, but said he didn't want to rush to federal legalization, because it was a good idea to see how it worked state-by-state first.
He wasn't entirely clear about what he meant, but I think the idea was that if legal pot succeeds in individual states first--that it, if it doesn't create serious new problems, and if it brings in considerable tax revenues--many of the anti-marijuana people will eventually drop their opposition.
He might also have a more selfish concern. Right now, I assume pot is only taxed by the states in which it's legal. if and when it gets a federal green light, a federal tax, no doubt hefty, will be added. That might cut into what the states can make on their own taxes...