My university announced a temporary freeze on PhD admissions due to issues with federal funding, with many departments announcing that they cannot accept any new students, and I know we're not the only one. A lot of people are wondering if they'll have a job in a year, myself included.

They've already damaged research/education, even if somehow it all gets undone. There's absolutely no reason to cause a brain drain in a country that has historically attracted students from all over the world.