Jermaine Johnson maintains his position as the frontrunner in South Carolina’s Democratic primary for governor due to his incumbency as a state representative and early campaign launch, which have produced consistent polling leads ahead of the June 9 contest. Mullins McLeod, a Charleston trial attorney, and Billy Webster, a former White House chief of staff and businessman who entered the race in March, draw support from distinct voter segments but trail in visibility and name recognition. Justin A. Bennett remains a lower-profile option. With the primary still weeks away, traders view Johnson’s structural advantages as the dominant factor shaping implied probabilities, though late endorsements or turnout shifts could narrow the gap.