Which country will the U.S. invade next, Iran, Syria, North Korea, Venezuela?

What Daniel C. said. North Korea and Iran are much bigger threats, and it's not a question of the U.S. wishing to invade any country, we've been too embroiled in other conflicts as it is and it has cost us deeply. The Bush Doctrine proved that we can't be involved in that type of thing. Being dragged into conflicts with either of those two countries is what I'd be worried about.