Newt Gingrich

Associated Press
Republican presidential candidate, former House Speaker Newt Gingrich announces that he is suspending his presidential campaign, Wednesday, May 2, 2012, in Arlington, Va.  (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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