Former House Speaker Newt Gingrich and his wife Callista Gingrich walk from the exhibition hall at the 40th annual Conservative Political Action Conference in National Harbor, Md., Saturday, March 16, 2013. (AP Photo/Carolyn Kaster)

Associated Press
Former House Speaker Newt Gingrich and his wife Callista Gingrich walk from the exhibition hall at the 40th annual Conservative Political Action Conference in National Harbor, Md., Saturday, March 16, 2013. (AP Photo/Carolyn Kaster)
Former House Speaker Newt Gingrich and his wife Callista Gingrich walk from the exhibition hall at the 40th annual Conservative Political Action Conference in National Harbor, Md., Saturday, March 16, 2013. (AP Photo/Carolyn Kaster)
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