Incumbent Republican Sheri Biggs holds a commanding lead in South Carolina’s 3rd congressional district, reflecting the seat’s consistent Republican performance and a Cook Partisan Voter Index of R+21. Biggs advanced unopposed through the June 2026 Republican primary after winning the 2024 general election by a wide margin, while Democrat Eunice Lehmacher narrowly secured her party’s nomination. Nonpartisan raters classify the race as Solid or Safe Republican ahead of the November 3 general election. Trader consensus at these levels aligns with the district’s voting history and structural advantages for the incumbent, though an unusually large national Democratic shift, late-cycle scandal, or significant turnout surprise could narrow the gap before ballots are cast.