The mental fitness question isn’t because of his view that we’re already in a Mad Max hellscape only he can lead the true believers out of.
The mental fitness question is because he sounds like he’s having a stroke anytime he has to string together more than 2 sentences.
Who fuckin’ knows, which is the problem.
SCOTUS reaffirmed a few years ago that limits can be put on what private citizens can own, to the disappointment of the “arms means ‘arms’” crowd. But that was before this whole fun angle of “justify it historically” was added.