Many agree that if Hillary is the nominee, she will have to offer the VP slot to Obama. He may not take it, but would be under tremendous pressure to do so. It would be a sure way for her to win.
But, lets say Obama is the nominee. Does he have to offer Hillary the VP slot? Would it help him? Would it attract working class white women to the ticket (arguably his weakest demographic). On the other hand, any dem will win NY and she has high negatives.