Graham still expects primary challenge

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Graham appears to be in strong shape for a challenge: His approval rating with Republicans stood at 57 percent in an April poll from Winthrop University, and he recently announced his campaign war chest has swelled to $6.3 million after a $1.4 million quarter.

But some conservatives in the state remain unhappy with his record, particularly on economic issues and immigration. The only announced candidate against Graham, social conservative and former House candidate Richard Cash (R), has given his own campaign $200,000 but has struggled to raise much more from others for the race.