I think the biggest difference is that it is far easier to recite a static speach he has practiced 100 times than it is to dynamically adapt to a live debate.
That cold must've hung on a long time, because people said he was just as bad at other events and meetups he went to. People were hoping it was just a bad night, but apparently it wasn't.
It's obvious the guy's highly motivated, and I've seen younger men overwork themselves into an early grave. It's no big shock that his mind isn't as sharp as it once was. Also, I'm sure having a stutter just makes that even worse.
They were both bad presidents. Nixon was just outwardly corrupt. JFK was not only a coke head, but also sort of an idiot that allowed the CIA to commit war crimes under his watch in Latin America.
They DO NOT practice these speeches, there's no time. Rather, they become like actors and are able to just go, pretty much like how news presenters do.
Not that I can really complain since they all use it now, but still. All you gotta do is read while the camera makes it look like you're looking at the Audience.
Yeah, the fact that this sounded a lot like one of his anti-Trump stump speeches, coupled with the fact that he barely mentioned Kamala, makes me think he's been rehearsing this one since before July 21st.