It seemed like it was the past, but it might become so again. Europe will never trust the US for defence again, which means it has to build up all defence capabilities internally. This will take many many years, but it seems almost inevitable now that it will happen.

When enough time has passed with Europe self sufficient in defence, there might arise cases where US and Europe has a conflict of interest that results in an armed conflict. Perhaps at first via proxy states depending on the type of conflict.