Surprise Twists in GOP Presidential Contest before South Carolina

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With just four remaining GOP candidates, will it all be over tomorrow, or did Gingrich, Santorum and Paul do enough damage in last night's debate to keep Romney from clinching the nomination in South Carolina? Also, the Supreme Court rejects Texas redistricting map, and Canada says its shale oil will go to Asia now that the President has rejected the Keystone XL pipeline. We hear the pros and cons.

Banner image: Republican presidential candidate Newt Gingrich (C) makes a point next to Mitt Romney (L) and Ron Paul (R) during a debate at the North Charleston Coliseum January 19, 2012 in Charleston, South Carolina. Photo by John Moore/Getty Images