 There's another key question overhanging the summit. What the White House might look like come January. Is it going to be another Donald Trump presidency? And if so, what's going to be the relationship between these NATO members from Europe and the U.S.? Because Donald Trump, of course, has been quite critical of NATO over the years, either its role in spending, that European nations are not doing enough to carry the can. That really degrades the whole idea of collective defense when it comes to NATO.