In my honest opinion, no one over 70 should run for any office in the U.S. I don’t care if they are Repug or Dem, the Dotard or Biden, Pelosi or Moscow Mitch. If they are 70 or older, they need to retire from politics.
I don’t care if he is in a wheelchair. The man is an excellent president.
But the average US voter likes a new model car every year, even if the current car runs great.
IMO, the saying “Don’t change a winning horse” applies here.