Biden's fate is completely hinged on who he picks as a VP.
Biden is basically Mr. Magoo Runs for President. He has the crime bill, the sex assault, his virtually conservative record, he's kinda a habitual space invader, all around grandpa weirdo, and his diminishing mental sharpness all working against him. If he wasn't Obama's VP, he wouldn't even be in this race.
Now that push has come to shove, I will vote for him, because we can't afford not to. But a large portion of the country doesn't have that view of him. He's not energizing, and he's alienating people that would've voted for him had he run in 2016, which is what he should've done in the first place.
Dude is shaping up to be 2020 John Kerry.