The South Carolina Democratic presidential primary market shows a wide-open 2028 field, with Kamala Harris at 27.5% implied probability leading a group that includes Jon Ossoff at 19.5% and Gavin Newsom at 18.8%. Traders assign lower shares to Cory Booker, Raphael Warnock, and others, reflecting uncertainty over which national figures will prioritize the state's early primary role in building Southern and Black voter coalitions. The close contest among top options stems from limited candidate commitments and the absence of decisive polling or endorsements this far from voting. Potential shifts could arise from formal announcements, national fundraising trends, or early state surveys that clarify paths to delegates.