I'm not sure how they could run anyone but Biden without just throwing out the primaries.
Not a single person voted for Cuomo in the primaries.
Pffft. Primaries, Schmimaries. Not necessary, just bread and circus to make the plebes think they have some kind of influence. We don't. A party will nominate whoever it wants to nominate, period. There's literally no law anywhere that says they have to run primaries. Even the election itself isn't called for by law.