I don’t know ... they can’t possibly think Biden’s their best candidate to make a serious challenge to Trump, can they? If they really thought a Dem win likely, they’d put up an Obama 2.0-type candidate—young, energetic, and charismatic, pretty much the opposite of Joe. I still think he’s either a sacrificial lamb or a placeholder until after the election when they’ll invoke the 25th.
Dems want to vote for Obama again. Biden was his VP. Their fantasy of Biden does not match reality. He’s frail and losing his marbles.