Leaving politics and ideology aside for the moment:
I am saddened to see how President Biden has deteriorated in the past few months. I watched his speech the other night and it did go well. But other events have been startling. Yes, I have watched the compilations of then-and-now done by conservative outlets . . .these are not "deep-fakes" or in any other way modified voice-overs. These are whole quote comparisons of his spontaneous, unscripted oral delivery of today compared with events as recent as a year ago.
O have worked in health care doing imaging with isotopes at a major hospital. While I am not qualified to make a medical diagnoses, I do know what I have seen and heard. I have worked with patients who are on their way to memory care. President Biden in on that road.
It must be hard to have worked so long, step after step, to achieve the experience, connections and credentials allowing one to climb that last rung to the pinnacle of one's carrer field . . . . only to find that you have aged out of full competency. His frustration at forgetting things he knows that he knows comes out time and time again. Everyone around him must know it. Anyone who hears him does.
My empathy comes from my own family experience at visiting my grandfather in his last days. He recognized me, but did no remember who I was . . . .and he knew that he should have.
Sadly, I believe that President Biden is well down that road.