Mallory Dittmer leads the two-candidate Democratic primary for South Carolina’s 5th Congressional District, an open seat after the incumbent’s departure, with traders assigning her an 83.5% implied probability ahead of the June 9 vote. Early voting begins May 26 in the open-primary system. Dittmer, a York County branding consultant and education advocate who entered the race in late 2025, has raised substantially more funds than Andrew Clough, a Rock Hill airline worker who launched his campaign in July 2025 emphasizing working-class issues. No recent polls or major endorsements have shifted positioning in the low-profile contest, leaving Dittmer’s resource and visibility edge as the primary factor reflected in current market pricing.