He was too young to vote, but old enough to be mayor.

The Lone Star Kid

The Lone Star Kid is about a compassionate eleven year old boy who becomes mayor of a small town when he witnesses an accident and a death due to lack of ambulance services. He is determined to bring big-town services to his small town. The movie is based on the true story of Brian Zimmerman, an 11 year old who became mayor of Crabb, a small town in Fort Bend County, Texas.