Newt Gingrich

Associated Press
Republican presidential candidate Newt Gingrich listens as he visits the Comprehensive Cancer Center at UAB Wednesday. March 7, 2012 in Birmingham, Ala. (AP Photo/The Birmingham News, Hal Yeager)

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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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