So we know it's quite unlikely to be Biden or Kamala running in 2024. They'll have to bring someone else in. Even if they're certain they have no chance to win, they won't run a vegetable Biden. If he continues to deteriorate at his current rate, he'll barely be able to speak and trying to make him run would make them look pathetic and more than a bit evil. If they're sure it'll be a loss for them they could put Kamala up in order to get rid of her.
So otherwise, who's the replacement likely to be? People have suggested Corey Booker, Gavin Newsom and Jay Inslee, and possibly Liz Warren,, Buttigieg or Beto. Has there been any research on match-ups between Trump and any of these hopefuls? I figure their best hope is to bring out someone who hasn't been in the national spotlight and puff them up with favorable news coverage. Newsom and Inslee could easily be attacked for allowing their states to degenerate into lawless hellholes covered with tent camps, even before 2020. It'd be great to watch Inslee getting grilled about CHAZ during a debate.