If the US becomes more isolationist NATO becomes a bit meaningless since NATO is basically the US guaranteeing everyone. And that is looking to happen even with

If the US becomes more isolationist NATO becomes a bit meaningless since NATO is basically the US guaranteeing everyone. And that is looking to happen even with Biden. The next president will almost certainly be an America First republican that will be more friendly to Russia than to western Europe. Western Europe from now on needs to defend itself.