Mark Smith leads the SC-01 Republican primary field with strong trader consensus due to his established record as a state representative, superior fundraising totals, and recent straw-poll results showing him ahead of challengers. The June 9 primary, which features a crowded field including Alex Pelbath, Jenny Costa Honeycutt, Sam McCown, and Jay Byars, remains the decisive event. A late-May debate on Hilton Head highlighted policy differences and criticism of Smith's legislative abstentions, yet these exchanges have not materially shifted positioning. The open seat created by Nancy Mace's gubernatorial bid and the district's Republican lean further concentrate attention on the frontrunner's path to a majority in the first round or potential runoff.