Nahhh, Joe is unable to make a decision because he is functioning at a low level.
They get hyped up over Kamala and ready to announce and he thinks everything is good. Then the wolves are at his door saying she is a loser and no way he should do that. He is trying to make chickensoup out of chickenshit with all of the potential nominees. I don't envy him in some ways. The minute he picks any one of them he is in trouble. Joe comes up with what he thinks is a great choice, then the handlers tell him otherwise.
And around and around they go. Get used to it if he wins. That's why Obama is trying to get Susan Rice in there as VP and Valerie Jarrett as his chief of staff- to bring some organized, officious bureaucrats in so that Joe will have adult supervision and serve as guardians for him. The dithering will end. Rice and Valerie will just tell him what he needs to do after consulting with Obama and Mooch. Boom. Your cardboard cut-out president in action.