Jermaine Johnson leads the South Carolina Democratic gubernatorial primary as the only sitting state representative among the candidates, with traders assigning the highest implied probability to his nomination ahead of the June 9 vote. Billy Webster, a Greenville businessman and former chief of staff to a prior governor, entered later and trails in market pricing despite reported party interest in his profile. Mullins McLeod, a Charleston trial attorney with prior statewide experience, and minor candidate Justin A. Bennett register minimal trader support. Recent polling shows high undecided shares among Democratic primary voters, while the upcoming debate and filing closure have clarified the field without shifting the frontrunner consensus reflected in current prices.