Massachusetts 9

Tyler MacAllister (R) vs Bill Keating (D).

Called by the AP: Bill Keating (D). Bill Keating (D) 62.2%; R. Macallister (R) 37.8%. 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%.