sentences:  He served on the Fairfield City Council rom 1970 to 1974 and as mayor of Fairfield from 1972 to 1974.Hannigan also served on the Solano County Board of Supervisors from 1974 to 1978 and served as chair of the board of supervisors.Hannigan served in the California State Assembly from 1978 until 1996 and was a Democrat.