Yet, states making marihuana legal while it's illegal at the federal level is a thing. If the federal executive branch did what they are "duty-bound" do to, the

Yet, states making marihuana legal while it's illegal at the federal level is a thing. If the federal executive branch did what they are "duty-bound" do to, then this wouldn't be possible at all. The methods the President chooses or doesn't choose to employ how to enforce the Controlled Substances Act seems to be more or less at their discretion in practice, and "we have limited resources and bigger fish to fry" seems to be a valid excuse, despite this being a judgement call at the whims of the executive branch.