Because he’s 81, and soon to be 82 in november. Getting him to january shouldn’t be a big deal. Getting him to January 2029 however, he’ll be 86. Can you name anything that might be not unexpected to happen to someone who is in their 80s? Why do you think a man who will be 86 when he leaves office (assuming he wins again) will still be operating at this same level now? Hell, he couldn’t get through a debate with trump a few weeks ago without clearly being an old person.