Nancy Lacore leads the SC-01 Democratic primary runoff market after topping the June 9 primary with roughly 36.5 percent in a seven-candidate field, advancing alongside Mac Deford who received about 28.9 percent. Her background as a retired Navy vice admiral and former chief of the Navy Reserve, combined with stronger fundraising and recent endorsements, has consolidated trader support ahead of the June 23 runoff. Deford, a local attorney and 2024 candidate with Coast Guard service, trails in implied probability due to his lower primary share and ongoing campaign contrasts over residency and party history. Remaining candidates received single-digit support and were eliminated, leaving the runoff outcome as the decisive factor reflected in current market pricing.