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Tea party challengers take aim at Graham

The South Carolina senator needs 50% of the vote to avoid a runoff in Tuesday's primary.

Sen. Lindsey Graham, R-S.C., speaks during a news conference, March 26, 2014, in Washington, D.C.
Sen. Lindsey Graham, R-S.C., speaks during a news conference, March 26, 2014, in Washington, D.C.CQ Roll Call

Irin Carmon