Definitely. The key thing is that NATO is starting to be seen as more of a burden than a boon for the US. Europe needs NATO, while the US does not. Trump, once this is over, will probably rage a lot but I wouldn't say it's guaranteed he will leave NATO. However, he definitely will push for the US to get something from Europe. Maybe related to Ukraine, maybe more defense spending, who knows. If he can't, then id definitely consider it a possibility