Biden has said he doesn’t support it
He has his tongue so far up black voter's asses that he has to support it. Without black vote Biden is toast. Also, white members of the Party are commissar Sander's supporters. Far, far, leftist.
Trump received 8% of the black vote, if he maintains that, or gains (which he should after 4 years of effort and economic success) to 12, 15, hell even 20%. Not only does Biden lose large, but the Democrat Party would have to regroup and run more to the middle, definitely more to America First.
This is why I believe the MSM know how important this election is for their democrat fortunes and control going forward. Even Fox to some degree are going to be more neutral or even show some Dem bias, as they like the Establishment system as well to some degree. Trump is uncontrollable, and that worried anyone with economic or politial clout.