Would it benefit a presidential candidate to go ahead a pick a VP running mate during the primaries? What if 2 guys decided to team up early, say a Walker / Rubio or Rubio / Cruz. It would obviously require 1 man to pull out of the race but I think it could have benefits. 2 out on the campaign trail communicating the same message and helping with fundraising. I know it couldn't be "official" until the convention but I would think if they won it would only be a formality. I wonder if Biden and Warren might try something along these lines for the DEMS. It would sink Hilary's boat.