I can't see Europe turning away from the US completely. I think what's likely to happen is that they're still going to do trade with the US and buy weapons from them, but US won't have any tangible commitments to Europe. I think the US is realizing they need to start cutting losses in terms of their military presence, and Europe is just not as important as Asia at this point. It's going to take a long time before relations between Europe and Russia normalize as well, so the US might figure they can put Europe on a back burner for now.