Timothy O. Schneider is the former chairman of the Illinois Republican Party and a former member of the Cook County Board of Commissioners representing the 15th district, which includes all or parts of Arlington Heights, Barrington, Barrington Hills, Bartlett, Elgin, Elk Grove Village, Hanover Park, Hoffman Estates, Inverness, Mount Prospect, Rolling Meadows, Roselle, Schaumburg, South Barrington and Streamwood.