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UNITED STATES - AUGUST 11:  Former Speaker of the House Newt Gingrich and his wife Callista, center, talk with Barbara Grassley, wife of Sen. Chuck Grassley, R-Iowa, outside of Stephens Auditorium at Iowa State University after the Republican presidential debate in Ames, Iowa.  The debate featured eight republican candidates including Gingrich.   (Photo By Tom Williams/Roll Call)

UNITED STATES - AUGUST 11: Former Speaker of the House Newt Gingrich and his wife Callista, center, talk with Barbara Grassley, wife of Sen. Chuck Grassley, R-Iowa, outside of Stephens Auditorium at Iowa State University after the Republican presidential debate in Ames, Iowa. The debate featured eight republican candidates including Gingrich. (Photo By Tom Williams/Roll Call)

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