 That's a question I also have because the declaration isn't binding and NATO doesn't have any enforcement mechanisms. So if Trump wins another term, I don't see how you hold him to these pledges. He's even indicated, of course, that he doesn't even feel bound by NATO's most sacred principle of collective security, the all for one, one for all pledge, which, by the way, as we recall, has only been ever used to help the U.S. after 9-11.