The US founders knew that international law recognized either citizenship by soil or by blood and chose to require both for the highest US office.
Neither Chavez, nor any other foreign sovereign has the ability to declare any natural born (soil and blood) US citizen to be a soil or blood citizen of Venezuela or of any other sovereignty with any expectation of recognition under international law.
That is the beauty of the founders NBC formulation. A soil and blood NBC is impervious to interference by a foreign sovereign and POTUS particularly as CIC would also be impervious and unaffected by dual loyalties of dual citizenship if NBC was properly enforced.
Yet you can be granted citizenship by other nations, and it will be accepted. So is the problem with dual citizenship or not?