Barack Obama's campaign is unleashing this ad in the swing states of Virginia, North Carolina, Florida, and Ohio next week -- states Mitt Romney is planning to visit on his looming bus tour.
The spot invokes the spirit (if not the letter) of Harry Reid's accusation that Romney might not have paid taxes for ten years.
"Did Romney pay 10% in taxes? 5%? O%?"
Then with a flourish.
"Isn't it time for Romney to come clean?"