Even if the next president is sane, it will take a long time to change the culture. Once border control agents get more power (or the feeling that they can use

Even if the next president is sane, it will take a long time to change the culture. Once border control agents get more power (or the feeling that they can use their power more arbitrarily), they will want to keep it. Also, the legal framework is not going to go back in time, either. It would take time to re-establish trust.