Well that's easily explained. The CIA doesn't technically have a completely unlimited budget and resources, so they have to shift their priorities around the continent occasionally. It might be random, I wonder if they have a big wheel they spin, like on "Wheel of Fortune" or if it's more like the big wheel on the "Price is Right". The big prize for this year is to topple the government and install a new puppet regime in... spins big wheel Venezuela, again! *everyone claps*

it happens every single time a leader is successful in steering its economy towards self sufficiency despite the road blocks put in place by the local american back oligarchy like it's happening in mexico right now.