They may want to leave him in Cali for a while longer. He's still young by their standards. Wouldn't surprise me at all to see Hillary picked as VP. Or Michael O'bama.
What throws me off though is Newsom. They just let Kamala be president for two years and then have Newsome come in? Have Newsom as VP first? How are they going to do this to get him in there?
Pretty sure whoever the newly made POTUS appoints, still has to pass both houses of Congress. A vote for any of those 3 from even the Riniest of Rinos would be career suicide.