In this case, his mental state is disqualifying for the office, so I don't have a problem making that an issue. It does make the dangers of his fascist dictatorship plans worse. The man thinks seeking asylum is the same as an insane asylum, FFS. He shouldn't even be allowed to run.

Fascists shouldn't be allowed to run anyway. If nothing else, the insurrection attempt should disqualify him (and all others who were part in it)

Does he really? Not that I'm surprised, considering he thinks stealth bombers are literally invisible like Wonder Woman's plane.