Charles Michael Thompson is an American politician serving as the U.S. representative for California's 4th congressional district (known as the 1st congressional district until 2013, and the California's 5th congressional district until 2023) since 1999. The district, in the outer northern portion of the San Francisco Bay Area, includes all of Lake and Napa counties and parts of Contra Costa, Solano, Yolo and Sonoma counties. Thompson chairs the House Gun Violence Prevention Task Force. He is a member of the Democratic Party.