Trump tweeted this week that the US will classify Antifa as a domestic terror organization. Here's a news flash: DHS classified Antifa's activities as domestic terrorist violence in 2016.
Captain Oblivious' proposed recognition of something that happened four years ago has no effect on the matter.
Only if he designates them as foreign terrorists or enemy combatants will the Patriot Act kick in and obliterate their constitutional rights – and if that happens, he will be Hitler.