Michel Obama has started to give public interviews about herself as a post-menopausal woman.
This is seen by many as a first step towards running in 2024. Running for what? Either President or Vice President . . .however the pre-primary jockeying works out. Either way, both Biden and Harris will be out of it.
In a pre-primary scenario, I can see Harris being encouraged to step down for "reasons of health" for some reason (ever see The Godfather"?), followed by Michel appointed to fill that slot, as happened in the Nixon administration in the 1970s. Replacing Bisen could wait till the primary or could happen sooner if his health "deteriorates" too.
Or maybe the classified documents fiasco combined with Hunter Biden's back-story make a continued Biden presidency untenable. . . .and he reigns as Nixon did.
The next 20 months or so will be interesting to say the least. Future political scientists and historians will build entire careers on documenting and analyzing this post Barak Obama period.