I'm not gonna try and make any predictions, but as for nationalism and "America First", well, I believe a big part of it revolves around first getting your own house in order, before trying to be the "saviour of the world". I'll also throw these links in for some additional perspective:

Link: Martin Armstrong: The Rise of Nationalism – Just Part of the Cycle

Also, I'd be hard-pressed to say anything more eloquently than Milo regarding "America First"... lol