He started off healthy and coherent, but the constant Trump pummeling really got to him about half way through and he rapidly changed to haggard looking, fumbling for words, mispronouncing words, and using the wrong word.
A lot of people think we were seeing his meds or performance enhancing drugs wear off.
Whatever it was the change was quick and horrible. Even his appearance went from somewhat robust to just plain worn-out and exhausted.
I cannot see a man in that condition as president.
I can’t see anyone who doesn’t love America, and who doesn’t defend America being President.