If they’re Federal Judges and not appointed for life, then Trump can demand their Resignation and replace every one of them.
Nope, the only way to fire a federal judge is through impeachment process, and our colleges brainwash the legal community into believing that unconstitutional tyranny is not a reason to impeach a judge. You can remove a judge for spitting or profanity, but not for tyranny. Insane, I agree. Complete misinterpretation of original intent.
But ... you can reorganize any court below the surpremes. As I understand it, reorganizing is through legislative branch.
However, I’m really glad that Trump is putting a spotlight on the idea of busting them up.