The politics of this are such as I see it.
It may be bad news for Biden; if I'm Biden, I want Trump. My calculus is this.
The average Trump supporter is the same guy who voted for Romney, McCain, and would have voted for Satan himself if there was an R next to his name on the ballot. They will turn out for whomever has an R next to their name in November 2024 whether it's the blob or not.
The average Republican who can't stand Trump will stay home if it's the blob on the ticket. They will find a way to stomach a woman, a black, or anyone else. Not the blob.
So I think this actually hurts Biden.