"Son of Boss" - Obama for America TV Ad" (with video)

BarackObamadotcom, with video (00:30):

Reporter:
"Was there ever any year where you paid lower than the 13.9%?"

Mitt Romney:
"I haven't calculated that. I'm happy to go back and look."

Voiceover:
"Did Romney pay 10% in taxes? 5%? Zero? We don't know."

"But we do know that Romney personally approved over $70 million in fictional losses to the IRS as part of the notorious Son of Boss tax scandal. One of the largest tax avoidance schemes in history."

"Isn't it time for Romney to come clean?"