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    Candidates clash on national security in 5th debate

    Globe reporters and editors are providing live updates from the CNN Republican presidential debate.

    Republican U.S. presidential candidates (L-R) Governor John Kasich, former HP CEO Carly Fiorina, Senator Marco Rubio, Dr. Ben Carson, businessman Donald Trump, Senator Ted Cruz, former Governor Jeb Bush, Governor Chris Christie and Senator Rand Paul pose before the start of the Republican presidential debate in Las Vegas, Nevada December 15, 2015. REUTERS/David Becker
    David Becker/REUTERS
    The candidates at the prime-time GOP debate.