Jermaine Johnson holds the lead in the South Carolina Democratic gubernatorial primary as the only sitting state representative among the candidates, giving him established name recognition and legislative experience ahead of the June 9 vote. Recent media appearances and campaign outreach have reinforced his positioning on issues like affordability and state growth, while Mullins McLeod has faced ongoing scrutiny from a prior arrest incident that prompted party calls to exit the race. Billy Webster entered later as a businessman and former White House staffer, and Justin A. Bennett maintains lower visibility. Traders appear to view Johnson's incumbency advantage and primary timing as decisive factors in the current consensus.