Biden says he asked Obama not to endorse him
I wonder if Biden would be the Dem candidate Trump would be most nervous of. Trump holds women in contempt, so he wouldn't care about a female candidate. Bernie's just a Commie, Mayor Pete's gay, inexperienced and a lightweight, but Biden is a senior statesman.
Trump can't use the "too handy" argument as he's like that himself.
Can't use the "too old" argument, as he's no spring chicken. If Biden does win the Dem race, it'll be an interesting campaign in 2020.