Yes. They set up a process and they have to follow it or else there could be lawsuits etc. but the OP said "it is a Law in the USA" seeming to refer to some law that the VP (or else Harris herself?) would have to be picked. There is no such law. And really I don't see much that's relevant to "federal election law" here other than, as you say, Biden will release his delegates and there will be some process where they choose a new nominee
Yes. They set up a process and they have to follow it or else there could be lawsuits etc. but the OP said "it is a Law in the USA" seeming to refer to some law that the VP (or else Harris herself?) would have to be picked. There is no such law. And really I don't see much that's relevant to "federal election law" here other than, as you say, Biden will release his delegates and there will be some process where they choose a new nominee
Biden doesn’t have any delegates now that he’s dropped out. All delegates are basically uncommitted.