Likely deliberately IMHO.
The Dems are in a quandary. Like the Pubbies they play the “it’s his/her turn” game when it comes to the nomination. And it’s his turn.
But he’s a sure fire-loser for several reasons.
1) The stench of his corruption is growing too strong even for Democrats to keep ignoring.
2) Their cadre of young core voters regard him as a fossil and a corporate sellout. They are all-in on Bernie and Fauxahontas.
3) His #MeToo vulnerabilities are also too pervasive to be ignored.
4) The pistons in his brain are misfiring more by the day, and having him out there on the campaign trail is just too much of a high-risk proposition.
So this may all be a sophisticated takedown of Biden. One that will point the blame at Republicans and keep Dem fingerprints off of it.
What do you think the odds are of Hillary entering the race as the “Unifier” are? Things seem to be going according to plan for her.