The Pima County Board of Supervisors is responsible for establishing the policies of the County that provide direction for the various departments and for appointing a County Administrator. The Board has the legal authority and responsibility to establish spending limits and approve the budgets of all County departments, including those of the elected officials. The Board also sets the amount of taxes to be levied in the County.
The members of the Board of Supervisors sit as the Air Quality Control District Board, Board of Deposit, Flood Control District Board, Library District Board, Stadium District Board, Zoning Enforcement Board of Appeals and various Improvement District Boards. The Chair of the Board of Supervisors, or his/her designee, is a member of the Corrections Officer Retirement Board, County Attorney Investigators Local Retirement Board and the Public Safety Retirement Board.
Members of the Board of Supervisors serve as appointees to the Board of Health and the Metropolitan Education Commission, and the incorporators of the Pima County, Arizona Municipal Property Corporation. The Board of Supervisors is represented on the Metropolitan Tucson Convention and Visitors Bureau (Visit Tucson), the Pima Association of Governments/Regional Transportation Authority and Sun Corridor.
Bronson defeated Gabriela Saucedo Mercer (R) in the 2020 general election receiving 57.3% of the 90,405 total votes. Mercer received 42.5%. A difference of 13,413.