Official campaign website to elect Democratic candidate Joan Buchanan for California State Assembly 2010, 15th District. Important political issues to Joan are education, healthcare, the environment and consumer protection. The California 15th Assembly District spans Alameda County, Contra Costa County, San Joaquin County & Sacramento County. District 15 includes the cities of Alamo, Bethel Island, Blackhawk, Byron, Brentwood, Danville, Diablo, Discovery Bay, Galt, Isleton, Livermore, Oakley, San Ramon, Walnut Creek, Walnut Grove, Wilton, Elk Grove, Pleasanton and Stockton. Democrat Joan Buchanan is running for election to the CA State Assembly to represent District 15 in the Democratic Caucus. Elect Joan to office in the November 2010 elections! Performance, Not Politics.