One, Biden has dementia and it shows. His unscripted public comments are more painful to watch than Trumps.
Two, He couldn't even get an endorsement from Obama. If your boss for 8 years won't endorse you, it's not a good look.
Three, he's already promised to pick a female candidate for his VP. The female options at his disposal are horrendously bad. His "best" option would be to beg Hillary to become his VP, and we all know how well she does in elections.
If the options are him or the psycho commie Sanders, then hell yes I'll vote for Trump.