Nancy Mace questions Darline Graham's Senate qualification

Rep. Nancy Mace questions whether Sen. Darline Graham meets South Carolina's Republican primary ballot eligibility rules.

South Carolina's new election laws require voting in at least two of the last three Republican primaries; Mace claims it is unclear if Graham has done so.

South Carolina GOP Chairman CJ Westfall is pursuing a formal review of Graham's qualifications.

President Donald Trump has publicly backed Graham's Senate campaign, posting 'Run, Darline, run.'

Mace has endorsed Rep. Ralph Norman as an alternative candidate, citing his conservative voting record.