In South Carolina's 1st Congressional District Republican primary, traders see a fragmented field with Mark Smith and Alex Pelbath virtually tied at 25.5% and 25.0% implied probabilities, reflecting no dominant frontrunner amid nine contenders challenging incumbent Nancy Mace's potential reelection bid. Recent Winthrop University polling shows Smith slightly ahead at 24% to Pelbath's 22%, buoyed by Smith's local fundraising edge and state House experience, while Pelbath leverages business credentials and self-funding. Sam McCown's 15.5% stems from conservative grassroots momentum. A October forum exposed splits on border security and spending cuts, keeping the race tight; separation could come from major endorsements, Trump signals, or Q1 FEC reports before the June 2026 primary.