The cabal that actually runs the Biden Presidency have power and influence due to Biden being the frontman. The same cabal has power within the conspiracy commonly known as the Democrat Party.
Those who seek to replace Biden must either overpower or placate the puppetmasters and a phalanx of Biden appointees and bureaucrats. This group will want to keep the imbecile in place, unless they are assured the replacement will retain them and give them the free rein to which they are accustomed.
“Outsiders” like Newsome or Whitmer would bring in their own mafia. Michelle Obama might fit the bill perfectly from the cabal’s perspective. But, having no qualifications herself, she would have to run as Obama’s fourth term, emphasizing continuity with the crap and buck idiots many voters are fed up with. Trump would need to convince the public that she was a Biden II/Dem insider or worse. MO has a temper, and no poker face at all. She could probably be triggered unto showing her nasty side, and complete lack to presidential self-control. I think she would self-destruct under pressure. Dem insiders likely know this. It’s a real shame they have such a dilemma.
“But, having no qualifications herself...”
That can be said for all democrats.