I think President gave a pretty good speech. He stuttered just a couple of times but but showed no signs of mental decline and even had a couple of zingers ready for Republicans when they tried to zinger him.. It makes me much more comfortable with November.
He showed some frustration over how lines came out, but all in all, he's aware of what goes a bit wonky when. It's certainly a sign that he's not quite as mentally sharp as he was.
The thing is, Trump isn't even aware of when he's shitting his pants let alone making a mistake, and I'll take "a bit frayed" over "complete dementia" any day.