my theory is and others have said the same
newsom appoints harris to senate seat
biden appoints newsom as vp
biden drops out
newsom/michelle 2024
“biden appoints newsom as vp”
That also takes a majority vote of both Houses of Congress.
If you think about it, it gets real complicated.
Repubs hold together in House ( a big maybe) and deny Newsom.
Senate is a mess if any of several Senators can’t vote for various reasons.
With no VP and Biden on his last legs McCarthy (or whoever is Speaker) has something past a remote chance of being President.