A longtime ally of President Donald Trump, he had sailed to victory in South Carolina’s Republican primary race on June 9. A crowded field, which includes his sister, Darline Graham, is now running to succeed Graham. The US Constitution and South Carolina state law allow the governor to select Graham’s replacement to finish his term. Outgoing Governor Henry McMaster, a Republican, announced Darline Graham as his pick on July 13, two days after her brother’s death. Prior to her appointment to the Senate, Darline Graham served as a former public administrator.