South Carolina's 3rd congressional district, anchored in the northwestern Piedmont region with a Cook Partisan Voter Index of R+21, features incumbent Republican Sheri Biggs against Democrat Eunice Lehmacher and Libertarian Brian Corriea on November 3. Biggs secured the GOP nomination unopposed after winning 71.7% in 2024, while Lehmacher prevailed in a close Democratic primary. Nonpartisan ratings classify the seat as Solid or Safe Republican, aligning with trader pricing that concentrates probability on a 30-40 point Republican margin. Limited recent polling, modest Democratic fundraising, and the absence of major national or local catalysts have preserved this baseline. Potential shifts could arise from unusually high Democratic turnout, late scandals, or broader midterm dynamics altering the district's typical partisan split.