Maurice Washington holds a strong lead in trader consensus for the Republican primary in South Carolina’s 6th Congressional District, scheduled for June 9, 2026, while John Peterson trails significantly. Washington previously served as chair of the Charleston County Republican Party, giving him established party ties and visibility in a key population center within the district. Peterson’s background centers on precinct-level leadership in the same county Republican organization. With no major endorsements, polling shifts, or campaign developments reported in recent weeks, the current implied probabilities reflect traders’ assessment of these established profiles and limited field competition ahead of the open primary. The outcome will determine the Republican nominee to challenge the Democratic incumbent in November.