Well the R party majority still backs him. Mitch is calculating it's better to remove him off the 2024 stage than deal with a break in the party.
The problem further with this is one of the reasons we have problems on the far right and the far left is that people are tired of the centrist establishment politicians that make their deals with the crony capitalists, protect the interests of the wealthy, have more in common with other globalists in Hong Kong London or wherever, send other's children to die in foreign wars while sending their own to Ivy league schools, and enrich themselves (as Clinton, Obama, and the Bidens did after office...maybe the Bushes too...don't know). Further, Biden (any more than say Romney) is not a great messenger to resolve this since, as a career politician, it's the world he is embedded in. My prediction is it will remove Trump from the table (stab the tyrant Caesar) but it doesn't resolve our problems....it only deepens them (and Trump literally has potential Augusti in his own family, though Anthony and Brutus are far more scary).