US/EU economies are too intertwined to be decoupled. Just distancing the US economy from China is hard.
But I'm not sure how much this will affect the costs of fabs?
That is not going to happen since ASML depends itself on some US supplied tech.
What should worry EU is US building capability of their own and sabotage ASML.
[1]: https://www.nextplatform.com/2022/10/13/tsmc-the-leading-ind...
I'm not entirely sure of the supply chain, but I'm fairly certain that ASML has significant operations and manufacturing in the United States. I'm in Portland and ASML has a large office here for obvious reasons.
I do love armchair hypotheticals like that, but a few seconds of thinking will show that a hostile takeover of the country will not mean the US retains access to ASML's machines.
As a European there's been a lingering feeling of anti-Americanism in Europe that's been somewhat dormant for the last 30 years. It's clearly awakening now, and it risks going mainstream too, which would basically make the position of US bases untenable unless there's a direct reward for them (like, having security guarantees)
And what makes you think EU countries won't kick out US soldiers until then?