Jody...I must disagree...While the choice of a VP is interesting and can win a home state or two...there has never been a VP that has been THE deciding factor in the last century...unless you think that Al Gore got Clinton in!
Traditionally Veeps are selected and announced right before or DURING the conventions to pump up the ratings and viewers with the suspense so it is still a bit early in the game unless someone starts falling way behind and NEEDS to make news.