Trump has a 25% chance of dieing of old age before his term ends. It is unlikely that the US will relax the 2 terms max for president allowing him a second term. If Trump is your worry then you can just wait him out. The real question is will others like Trump get into power next or not, and if so how like Trump are they? (I cannot answer that)
If Donald Trump is the sole motivation for this, they are hopelessly stupid. They need to be in control of their own infrastructure regardless of who runs the USA.
I would certainly not bet on MAGA be gone post Trump. Firstly VP JD Vance is just as hostile, and ready to take over during Trumps term should anything happen.
Regardless, these euro-hostile MAGA voters will still breathe, eat and vote republican for the rest of my lifetime.
We should prepare in Europe for a future without the US in my opinion. Like China, but not, since the EU is about openness and freedom.