I hate to be the guy, but I find myself having to point this out to all of my doom-minded American friends. Yes, Trump is a criminal idiot, but one positive, probably unintended effect is that the world becomes more, in the words of Taleb, anti-fragile. As an American I am thrilled that Europe is becoming more united, more pragmatic, and more self-reliant. Our relationship is not over, it is just changing, and Europe is experiencing a long-needed renaissance.

Of course Europe always had some ability to defend itself, but I think it's clear that some of that ability was outsourced to the US(with reciprocal benefits for the US, but still). Yes, this introduces some redundancy into the Western sphere, but that's a good thing.