The current guy in power has just as many cognitive issues, but it is a few years younger, is louder and doesn't have a stutter. That is, apparently, enough.

Democrats did screw up by not allowing the people to choose the candidate. They also screwed up again by not preemptively creating safeguards in case Trump won, and by not strengthening the elections. Too many ballots were thrown out.

Now they are further enabling this by basically displaying no opposition.