All the delegates amassed by Biden are pledged/bound to vote for Biden for the first round, some are pledged, bound to vote for Biden through the first 3 rounds depending on each state’s laws or democratic party rules in each state concerning delegate selection. Unless Biden releases his won in the primary delegates, they must vote for Biden for the democratic nomination.
If Biden did step aside, could he tell his won delegates to vote for whoever he wanted them to vote for? After all, they’re Biden’s delegates. But that is an open question with no answer. Biden could release his delegates unconditionally to vote for whoever they choose, or he could direct or instruct them to vote for so and so. Unless this happens, there is no answer.
