There's no way the EU will allow US to force ASML to move to the US, especially given the burning of the bridges of decades of diplomacy by the incumbent president.

If the trade war continues and escalates, which form our current perspective it looks like it will, the EU will not lose one of its greatest assets in that space.

The idea of Trump that the US is powerful enough to strong arm everyone to his will is mistaken, an alienated US without its allies will suffer, as will the rest of the world..