He'll become less Presidential. He now knows he can get away with almost anything, he knows nothing his base wants is getting past Nancy and possibly Schumer, 2020 depending, and if he's not planning on running for re-election in 2024 what would the pretense be for?
My Dad's 78. His ability to refrain from being the hugest asshole possible to almost everyone, for absolutely no reason at all, has been hang gliding with an anchor relative to the early 70s. My mom and I find ourselves saying the same things to him he'd say to me when I was 4 years old, and we weren't on eggshells every time we went out in public just five years ago. He had some semblance of patience, some ability to hold his tongue. Now, someone gets within sensory perception, it's about even money he'll talk sh!t under his breath, which in many settings, everyone can hear.
Trump's been completely graceless his entire life.
I hope Bloomberg or Buttigieg or someone other than Biden or Bernie gets the nom on account of how ugly the campaign will be. I don't see Bernie/Biden keeping their cool on a debate stage the way HRC did. I'd give it 1 in 4 odds of a Grampy fight, literal feeble fisticuffs, if one of those two faces Trump in the general.