What evidence and what background do you have to make a diagnosis of dementia?
I've seen his live appearances. That's my evidence, partisan tard. Why don't you ask your own party? They were all saying it back in the primary until it became clear he was getting the nomination. Then they all stopped talking about it and began complaining about everyone else pointing it out.
Biden is not Trump; Biden is not a megalomaniac, Biden does not meet the criteria to diagnose several Personality Disorders, as does Trump.
Trump is a narcissist for sure, but I'll give him credit for knowing what day it is and not drifting off into a collection of unintelligible gobbledygook mid sentence.
If Trump manages (a good word) to get elected he will have managed to suppress the vote.