Why is Gavin Newsom not running for reelection here? He's obviously safe. As is Andrew Cuomo.
I have Newsom running for the Senate with Kamala now VP.
Cuomo's only not safe in the sense that a Working Families nominee (if that isn't Cuomo) could draw votes from him.
Baker's going to face a tougher opponent than he got in 2018. Kennedy's got nothing to do, and as has been previously noted, it's unlikely he runs for anything other than Governor or Senator (if Warren ends up in the Cabinet.)
I doubt Newsom has any interest in being a senator. My impression is that he enjoys being executive guy and that he wouldn't forgo a second term as chief executive of the most populous state. A lot of governors who join the senate get frustrated over the job. Especially when they were in charge of larger states.
Even if Working Families ran a candidate, I doubt he would get much more than 4-5%. Cuomo is governor as long as he wants it. I could see him joining a Biden Administration though.