They stabbed him in the back after it was clear he had no path to victory. He made the Democrat Party look weak, and for a party obsessed with power above all things, Biden's failure during his debate with Trump was an unforgivable sin. He had to go, and he didn't want to. They forced him out anyway, and now the man who dedicated the vast majority of his adult life to the party had to watch as the party pushed him out and abandoned him.

To be fair, he should have seen that coming. The Democrat Party doesn't have friends, just relationships of convenience. If you advance the party, you're the toast of the town. Become a hurdle and you're as good as roadkill.

That said, if Biden really wanted to take the knife out of his back and drive it into the Democrat Party's, particularly Harris's, he really only needs to do one thing.

Just say, on a live camera where everyone can watch it happen in real-time, that Donald Trump is not a threat to Democracy. //

One word about how Trump isn't as bad as all that in, that would send the news cycle into a tailspin. They would have to make commentary about how Biden has actually been mentally unwell. This would, of course, throw into question how long he's been mentally unwell and how long the Democrat Party has known.