South Carolina 4

William Timmons (R) vs Courtney McClain (D).

Called by the AP: William Timmons (R). William Timmons (R) 51.6%; Courtney McClain (D) 45.8%. Source: The Associated Press.

Cook: Solid R. Public polls: 0.

Atlas pre-election model — built only from data frozen on October 29, 2026; first published November 3 after polls closed, so it is a test of the method, not a prediction. Republican chance in that model: 100%.