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Christie and Paul spar over national security in tense debate moment

The national-security exchange between Chris Christie and Rand Paul was easily the most heated — and personal — part of the debate.

Republican presidential candidate New Jersey Gov. Chris Christie participates in the first prime-time presidential debate hosted by FOX News and Facebook at the Quicken Loans Arena, Aug. 6, 2015 in Cleveland, Ohio. (Photo by Chip Somodevilla/Getty)
Republican presidential candidate New Jersey Gov. Chris Christie participates in the first prime-time presidential debate hosted by FOX News and Facebook at the Quicken Loans Arena, Aug. 6, 2015 in Cleveland, Ohio.Getty Images

Chuck Todd

Chuck Todd is NBC News' chief political analyst and the former moderator of "Meet The Press."