September 8, 2011
Republican presidential candidates, from left, former Pennsylvania Sen. Rick Santorum, former House Speaker Newt Gingrich, Rep. Michele Bachmann, R-Minn., former Massachusetts Gov. Mitt Romney, Texas Gov. Rick Perry, Rep. Ron Paul, R-Texas, businessman Herman Cain and former Utah Gov. Jon Huntsman stand together before a Republican presidential candidate debate at the Reagan Library Wednesday in Simi Valley, Calif.
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Eager to tangle, Republican presidential rivals Rick Perry and Mitt Romney sparred vigorously over job creation and Social Security Wednesday night in a feisty campaign debate that marked a contentious new turn in the race to pick a 2012 challenger to President Barack Obama.