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MANCHESTER, NH - FEBRUARY 06:  Republican presidential candidates Donald Trump and Sen. Ted Cruz (R-TX) participate in the Republican presidential debate at St. Anselm College February 6, 2016 in Manchester, New Hampshire. Sponsored by ABC News, the Independent Journal Review and Google, this is the final televised debate before voters go to the polls for the New Hampshire primary on February 9.  (Photo by Joe Raedle/Getty Images)
MANCHESTER, NH - FEBRUARY 06:  Republican presidential candidates Donald Trump and Sen. Ted Cruz (R-TX) participate in the Republican presidential debate at St. Anselm College February 6, 2016 in Manchester, New Hampshire. Sponsored by ABC News, the Independent Journal Review and Google, this is the final televised debate before voters go to the polls for the New Hampshire primary on February 9.  (Photo by Joe Raedle/Getty Images)

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    GOP candidates react to possible North Korean threat

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GOP candidates react to possible North Korean threat

During the ABC News Republican debate, candidates were asked how they would respond to the threat of a North Korean missile.

GOP candidates react to possible North Korean threat

During the ABC News Republican debate, candidates were asked how they would respond to the threat of a North Korean missile.