The CIA was involved in the failed 2002 coup attempt in Venezuela when the army took over and dissolved the parliament, temporarily.
In 2018 the CIA was again planning a coup, or disruption at least, revolving around the planned December 2018 elections. The Venezuelans got wind of this and bumped the elections up a few months. The CIA was caught flat footed somewhat, and the December plans went into effect early. The idea floated that the 2018 elections were rigged doesn't really fly. Even Trump didn't like the puppet the US was trying to push as the real head of Venezuela, Guaido. He called him the Beto O'Rourke of Venezuela.