Susan A. Davis (born April 13 1944), is an American politician who has been a Democratic member of the United States House of Representatives since 2001, representing California's 53rd congressional district (map). The district includes just under half the city of San Diego, as well as the entire cities of Coronado, Imperial Beach and Lemon Grove http://www.sen.ca.gov/ftp/SEN/cngplan/CD53.HTM..