Sen. Lindsey Graham (R-SC) seems, according to this poll, to not have the strongest support from fellow SC Republicans:

• One question about controversial U.S. Sen. Lindsey Graham asked Republicans if they would re-elect him: 36 percent said yes, 24 percent said they'd vote for someone else, while 37 percent said their votes would depend on who runs against him.

Fellow "grand bargain" backer McCain also doesn't sound too popular in SC according to this poll.