If I didn't know better, I would think that the administration puta him up to saying this stuff, just to take the edge off.
"Hey Joe, things are getting bad again. Go back out there and say something stupid."
There was no way he was taking Hillary as a VP, that would have been a death sentence, so he found some bumbling fool, even dumber than he, who would make someone think twice before attacking the POTUS.
Imagine Biden and Pelosi running the show. If things are bad now, I can't even imagine that scenario.