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U.S. Senator Lindsey Graham, R-SC, speaks on security threats at the U.S. Capitol on March 12, 2015 in Washington, D.C.
U.S. Senator Lindsey Graham, R-SC, speaks on security threats at the U.S. Capitol on March 12, 2015 in Washington, D.C.

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John King, Julie Pace and Jonathan Martin discuss Lindsey Graham's entry into the 2016 GOP presidential primary race.

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John King, Julie Pace and Jonathan Martin discuss Lindsey Graham's entry into the 2016 GOP presidential primary race.