Both the EU and its large member-states need to significantly ramp up funding to exfiltrate scientists from the US. This could be a force multiplier as important as getting German scientists was after WWII, or Russian ones during the Cold War. It would also be a tremendous amount of progress for not that much money, all things considered.

And I say this with no joy whatsoever, because all these developments are damaging great collaborations and personal relationships with friends and colleagues in the US.