Colorado 4

Lauren Boebert (R) vs Eileen Laubacher (D).

Count in progress (76% of the expected vote): Eileen Laubacher (D) 50.6%; Lauren Boebert (R) 46.5%. Source: The Associated Press.

Cook: Lean R. Public polls: 1.

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: 88%.