 seems like this would be really unprecedented in any impossible how would they even work so unless joe biden decides himself that he's stepping aside i don't think it is possible uh... there are the delegates are pledged they're not bound so you could have a fight but then it gets to be really really tricky if you're buying decides he's going to go out and then also someone would have to challenge right so i think joke the first step is joe biden would have to make the decision