Will there be video evidence strongly implying that Joe Biden regrets dropping out of the presidential race, before the end of his term?
Some things that would make this resolve YES:
Biden says he would have won had he been the nominee
Biden says it was a mistake to drop out
If nothing like this comes out, resolves NO at the end of Biden's term.
Things that wouldn't count (not direct enough):
Biden says top Democrats shouldn't have put pressure on him to drop out
Biden says he wasn't too old to run
I will not bet here.
@bluerat She was part of the push to replace him. Obviously. She was the candidate all the Dems pushed for behind the scenes. Or, maybe you believe that she recused herself from one of the biggest political inflection points in modern US history.