Illinois 1

Christian Maxwell (R) vs Jonathan Jackson (D).

Called by the AP: Jonathan Jackson (D). Jonathan Jackson (D) 67.8%; Christian Maxwell (R) 32.2%. Source: The Associated Press.

Cook: Solid D. 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: 0%.