Trump should remove the federal government from this question pronto.
Indeed - the federal war on marijuana is manifestly unconstitutional.
He holds that position, that it is a state issue, but unless he wants to break the law, like 0bama did on DACA for example, he needs to have Congress give him a bill that changes current FedLaw.
At least I think he does. I stand ready to be corrected.
Not his decision. Congress will have to repeal it and he can decide it.
I wonder if Nancy Pelosi would give to Trump the opportunity to sign legislation that decriminalizes marijuana at the federal level. I doubt if she would. In her eyes anything that would make Trump look good is bad.