Mark Smith holds a substantial lead in the SC-01 Republican primary as the only sitting state representative in the field, backed by a record of conservative votes in the South Carolina House and consistent top placement in early straw polls and fundraising reports. The June 9 primary for the open seat vacated by Nancy Mace features ten Republican candidates, with recent candidate debates highlighting policy differences on infrastructure and redistricting. Alex Pelbath, a retired Air Force colonel, has drawn attention for his military leadership emphasis and has trailed Smith in informal polling. Lower-polling contenders like Sam McCown and Jenny Costa Honeycutt remain visible through local council experience but trail in visibility and resources. Trader consensus reflects these established campaign fundamentals five days before voting.