Ted Mason, a Democrat, and Gabriella Hoxie and Daniel Lee, both Republicans, are running for Cook County Board of Commissioners in the 15th District primary. [Campaign photos]

The race for the 15th Cook County Board of Commissioners district seat will be a bout between an outgoing commissioner’s chief of staff and the winner of a competitive primary between a staff member from the Republican leader of the state house of representatives' office and business owner involved in Hoffman Estates government.  

Ted Mason, chief of staff for Cook County Comm. Kevin Morrison (D-15) is running to replace his boss on the county board of commissioners. Mason is running unopposed in the Democratic Party primary and will face the winner of a two-way primary on the Republican side.

The 15th District contains all of Hanover and Barrington townships and parts of the townships of Elk Grove, Maine and Schaumburg.