It's a dead horse. Now we are talking about the Harris nomination. Pushing Biden out was sort of a mini coup after his horrible debate (while likely sick with covid). His nomination was not contested and thus there was no other primary results to fall back on. In this situation, Harris made for the logical front runner and for the sake of unity and short notice, no one else threw their hat in the ring. That was well within the rules. Biden's delegates did become free agents, but with no one else running they pushed their support to Harris. Again, all well within the rules. The only ones calling sour grapes are Republicans hoping to sow chaos within the Democratic Party ranks. Maybe they should look at their own chaotic ticket with the faux hillbilly and the increasingly decrypt ornage guy.