February 5, 2012
Republican presidential candidate former House Speaker Newt Gingrich speaks during a news conference Saturday, Feb. 4, 2012 in Las Vegas. (AP Photo/Evan Vucci)
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Georgia's Republican primary is shaping up as a role reversal for the two leading candidates, with Newt Gingrich backed by establishment support and a home-state network, while Mitt Romney is trying to play the role of an insurgent spoiler.