Exactly
If Biden steps down, tens of millions of people will be hyper energized
The people who really really love them some Joe Biden will get over it very quickly
Trump loses his boogeyman. MAGA loses their boogeyman.
The more I think about it, Josh Shapiro is the choice, with Whitmer as #2
That's PA and MI in the bag. Shapiro is very sharp, very smart, but is too damn boring to be a boogeyman. You can't put him in the Bernie Sanders bin and just point COMMUNISM! He'd cut Trump up like a Kobe steak.
I do not believe that there is a tangible population that will sit out because it's not Harris. They certainly won't vote for Trump in protest. And MAGA will lose it's energy and have a lower turnout.