Probably not, but you can never tell with these guys. Rumsfeld's remarks? Softening people up so that they could if they really decided they wanted to. I can't see a scenario where it would become likely, but I wouldn't put it past them if somehow circumstances were to arise that gave them a reason. At any rate, if I were a Venezuelan military planner, I'd consider it an eventuality that should be taken seriously and planned for as a worst-case scenario. Or perhaps slightly more likely, a US-backed attack by Colombia.