Corin, I don't want to venture a guess on this question, can you answer it, please? Thanks.
Yes, Bolling would become Governor, but only if Kaine resigns (and Kaine may decide to hold onto the office until the election and hedge his bets, just in case Obama would lose). If Bolling does become Governor, it throws a monkey-wrench into the next election, since Bolling has already withdrawn any designs on the office, he might presumably prefer to remain as Governor, so Atty Gen McDonnell might have to reassess his own plans.
That’s the LT Governor is for. However Kaine would not resign early. He’d only leave if Obama wins.