I'd love to see hard campaigning against him on the merits rather than on ageism and ableism, though. Even if he were younger and fully abled, he'd need to be fought hard based on his fascist intentions (that also show in his vp pick)

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.