Former Republican presidential hopeful Newt Gingrich and his wife, Callista, appear at 

Former Republican presidential hopeful Newt Gingrich and his wife, Callista, appear at a campaign stop for Missouri Senate candidate Rep. Todd Akin, R-Mo., at Union Station, Wednesday, Oct. 31, 2012, in Kansas City, Mo. (AP Photo/Charlie Riedel)
Associated Press
Former Republican presidential hopeful Newt Gingrich and his wife, Callista, appear at a campaign stop for Missouri Senate candidate Rep. Todd Akin, R-Mo., at Union Station, Wednesday, Oct. 31, 2012, in Kansas City, Mo. (AP Photo/Charlie Riedel)
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