I'll just cancel my rental agreement, move my furniture across continents, cancel my other subscriptions, oh wait that's got a few month notice period so I'll have to pay up for months I don't need anymore, let alone all the friendships and social connections I made that I never got to say a proper goodbye to.
This is extremely unappealing to skilled workers, and the loss of trust will extend past this current administration, if all it takes is one idiot in office to upend your life, you can't trust that country and its people anymore.