Pretty much no one cares that Biden is the VP nominee for Obama. Of those who do, 13% say it makes them “more likely” to vote for Obama and 10% say it makes them “less likely.” Without seeing the internal numbers, my guess is those 13% are mostly already Obama supporting Democrats who think Biden will help and the 10% are McCain supporting Republicans who for whichever reason don’t like Biden. Bottom line, Biden will probably help Obama govern if he wins; Biden won’t help him (or probably hurt him) in trying to win.