I believe they think with Biden they will lose less of the down ticket races than they would with Bernie. They just want to minimize the losses.
Uh-huh. They think the press will cover for Biden, carry him into the White House. Once there, they find a replacement for the sour old fool.
Bernie, Butt-buddy-gieg, who cares. At that point they can roll in Stacey Abrams if they want to, or Donna Brazil, or Hillary for V.P.
Just gotta keep Joltin Joe off the machine shop floor.