President Trump strongly hints he’s authorized CIA anti-cartel activity within Venezuela. He notes we now have the sea lanes off Venezuela pretty well locked down.
This may be a bluff, with the hope Maduro starts a purge within his ‘government’ of anyone suspected of less-than-total loyalty. This sort of “housecleaning” normally results in less effective government as everyone wastes time on butt-covering. Supporters of those purged become less loyal in fact, if performatively more loyal.