Nancy Lacore holds a strong lead in the SC-01 Democratic primary runoff market after topping the June 9 primary with roughly 36% of the vote and advancing alongside Mac Deford, who finished second at about 29%. Lacore, a retired Navy vice admiral making her first run for office, benefits from name recognition, military credentials, and early endorsements such as from EMILYs List, while the remaining vote split among other candidates including Francina Dantzler, Mayra Rivera-Vazquez, and Ben Frasier helped secure her position. Deford, a Coast Guard veteran and former candidate, maintains a narrower path through local support and campaign activity ahead of the June 23 runoff. Traders price the outcome accordingly, with Lacore at 80.5% reflecting her primary momentum and profile advantages in the Lowcountry district.