" Democrats holding onto Biden are more what concern me. He's possibly the only person on earth who could actually lose to Trump. And they're holding onto him for what? Sunken cost fallacy? Loyalty to a 50 year politician who would himself be the most egotistical, elitist, corporatist sell out and pathological liar in the nation were it not for Trump?"

It starts with 2020. In a divided field it looked like Bernie Sanders was primed to do what Trump did in 2016. Democrats rightly believed that Trump would beat Sanders, so they huddles, looked at their pathetic cast and decided Biden had the best chance of winning so they rallied around him. Then, Democrats made a huge mistake by insisting that VP be a woman of color. Period. With Biden's choices now limited he chose Harris which was a horrible choice.

Fast forward to this spring. Dems didn't have a real primary. So, Biden has the delegates pledged to him. Biden's inner circle knows how bad of shape he's in. So do any of us with eyes and ears who have been watching him during his presidency. His public appearances are tightly controllled and scripted. His aides protect him constantly. The MSM dutifully repeat every lie they are fed about Biden's fitness. Just 3 weeks ago mainstream news outlets were angrily calling out video footage of Biden displaying dementia overseas as "cheap fakes." Then the debate happened. Biden was clearly not pumped up with drugs l8ke he was for SOTU. But it didn't matter. Read8ng from a teleprompter is not the same is thinking on one's feet and speak8ng off the cuff. So Biden was finally fully exposed because his party miscalculated by challenging Trump to a debate completely on Biden's terms. Trump immediately accepted. Biden spent 6 days holed up at Camp David doing nothing but debate prep and THAT was the outcome.

So, here is the answer to your question - Democrats can't dump Biden. Not now. Here's why - Kamala Harris. The only chance you have is for Biden to now announce that he's finishing his term and won't run for re-election. It would be very difficult to ditch Harris as the nominee but not impossible. But whomever the nominee is he or she would not be chosen by Dem primary voters but by Dem leaders behind closed doors in a smoke filled room. And because the party is SO fixated on identity politics if not Harris they'd have to find another woman of color. 2 names that I've seen floated sr3 Newsome (white man) and Whitmer (white woman). Neither checks all of the boxes. So do they insert Stacey Abraham's? She's awful. And just think about the optics of it all. Biden clearly can't execute even a fraction of his duties yet they were sticking with him anyway just so long as they could keep his condition hidden from the public.

Odds are low that they can thread the needle. Likely they are stuck with Biden. They can't afford to run Harris. So, I think the strategy will be to try to drag Biden to November 5 and 2 weeks after inauguration he can resign/retire. Dems believe they can't have candidate Harris but are okay with President Harris, no matter how awfully she will liklely perform, because it preserves their power for now. That's all that matters to them these days.