Could Donald Trump actually dismantle NATO?

Answer 1

No he could not, and in fact, no US president could. NATO is an organization comprised of twenty-eight member countries. One country might decide to withdraw from NATO, but the organization would continue to exist. Thus, even if the US under Mr. Trump left NATO, there would still be many other nations that would continue to participate. As the NATO website says, "NATO’s essential purpose is to safeguard the freedom and security of its members through political and military means." Of course, the US is considered a very important part of NATO, but with or without its participation, other nations would still be members.