In this Oct. 16, 2012 file photo, Republican presidential candidate, former Massachusetts Gov. Mitt Romney and President Barack Obama spar during the second presidential debate at Hofstra University in Hempstead, N.Y. (AP Photo/Charlie Neibergall, File)

Associated Press
In this Oct. 16, 2012 file photo, Republican presidential candidate, former Massachusetts Gov. Mitt Romney and President Barack Obama spar during the second presidential debate at Hofstra University in Hempstead, N.Y. (AP Photo/Charlie Neibergall, File)
In this Oct. 16, 2012 file photo, Republican presidential candidate, former Massachusetts Gov. Mitt Romney and President Barack Obama spar during the second presidential debate at Hofstra University in Hempstead, N.Y. (AP Photo/Charlie Neibergall, File)
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