I believe the President is the C-in-C of the armed forces and can declare him a national security risk and arrest him for military tribunal.
Meanwhile I have searched far and wide and I have seen that fascism will absolutely take over the US because as long as it is by “legal” means the people will grumble but kneel and submit because Americans are lazy worthless shits mostly composed of mealy-mouthed centrists who tell you to “vote harder”.