It’s been used before to punish political speech, especially during the Mcarthy era against “un american” speech like support for labor rights where the government couldn’t win in court. I thought we had all agreed that was bad and moved passed it, but, I guess not.

(Notably it was used against WEB Du Boise and then when it was lifted and he traveled to Ghana, the US state department refused to renew his passport stranding him there until he became a Ghanaian citizen.)