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Newt Gingrich

Associated Press
Republican presidential candidate, former House Speaker Newt Gingrich signs autographs at Stoney's Rockin Country, Friday, Feb. 3, 2012, in Las Vegas, Nev.  (AP Photo/Evan Vucci)

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Republican presidential candidate Newt Gingrich took to the podium in a Las Vegas honky-tonk bar to slam Mitt Romney ahead of the Feb. 4 primary in Nevada.

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