The June 9 Republican primary for South Carolina’s 1st Congressional District produced a fragmented result, sending Charleston County Councilwoman Jenny Costa Honeycutt (22%) and State Representative Mark Smith (18%) into a June 23 runoff after neither reached 50%. With the open seat vacated by Nancy Mace, the crowded field of local officials and business figures split conservative voters across the Lowcountry, leaving both finalists with similar bases and no dominant frontrunner. Trader consensus prices near 50-55% for each reflect uncertainty over runoff turnout patterns, endorsements from eliminated candidates, and a scheduled June 17 debate that could shift momentum. Other listed contenders trail far behind and hold negligible implied probabilities of overtaking the top two.