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Tim Scott Refuses To Endorse Fellow South Carolina Sen. Lindsey Graham (VIDEO)

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"You know, as you three have just heard recently, I am up for re-election next year myself," Scott said. "I’m going to make sure that Tim Scott gets out...I'm gonna allow for all the other folks on the ballot to represent themselves very well. I'm gonna continue to work hard for my election."

"So no endorsement for Lindsey tonight?" host Van Jones asked.

"I certainly am going to work really hard for Tim Scott," the junior South Carolina senator said. 

A two-term senator, Graham is facing a crowded primary field that includes four GOP challengers. Scott was appointed late last year by South Carolina Gov. Nikki Haley (R) to serve the remainder of former Sen. Jim DeMint's (R-SC) term.