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A look back at Thursday night's GOP debate, and a look ahead at Saturday's Democratic Primary in South Carolina and, days later, Super Tuesday. Plus New Jersey Governor Chris Christie's endorsement of Donald Trump and what the NPR Politics team just can't let go this week. This episode: congressional correspondent Susan Davis and campaign reporter Scott Detrow with hosts Tamara Keith and Sam Sanders. Find the team on Twitter @DaviSusan, @scottdetrow, @tamarakeithNPR, @samsanders, or at npr.org/politics. You can email the show at nprpolitics@npr.org.