The US as more than likely quite involved in the 2002 attempoted coup in Venezuela, and that failed. It wouldn't surprise me if they're active down there now as well.
Well, of course they are.
Castro's buddies too.
I imagine the Chinese are busy seeing what kind of support they can garner as well.
And Vlado may be on the phone in the morning.
Which group of evil bastards would you like to have pulling strings ?