Cook County Comm. Sean Morrison (R-17) speaks during a finance committee meeting on Nov. 20, 2025. [Livestream]

Cook County Comm. Sean Morrison (R-17), the sole Republican on the Cook County Board of Commissioners, announced late last week that he had decided not to seek reelection next year, therefore eliminating a competitive primary with another Republican who also filed for the seat.

Morrison filed for reelection on Nov. 3, the final day of filing. He has yet to formally withdraw from the race.