Joseph Natalio Baca Sr. is a former U.S. Representative, last serving California's 43rd congressional district as a member of the Democratic Party. The district, numbered as the 42nd from 1999 to 2003, is located in southwestern San Bernardino County and includes Fontana, Rialto, Ontario and parts of the city of San Bernardino. After redistricting, he decided to run in the new, adjacent 35th congressional district, where he faced fellow Democrat Gloria Negrete McLeod (due to California's "top two" primary system). On November 6, 2012, Baca lost his seat by a margin of 55.7% to 44.3%. He ran again in 2014 but came fifth with 11.2%. He subsequently announced that he was running for Mayor of Fontana. He lost in a landslide and subsequently announced his retirement from politics.