2017 California's 34th congressional district special election

A special election was held on June 6, 2017, to elect the member of the United States House of Representatives for California's 34th congressional district. A special open primary election was held on April 4, 2017.

Incumbent Representative Xavier Becerra, nominated by Governor Jerry Brown to succeed Kamala Harris, was confirmed as Attorney General of California on January 23, 2017. Harris, who was elected to the United States Senate to succeed Barbara Boxer, resigned as attorney general on January 3, 2017.

Democrats Jimmy Gomez and Robert Lee Ahn advanced to the runoff. Gomez defeated Ahn 59.22% to 40.78%.

Democratic Party
Upon the announcement of incumbent representative Xavier Becerra's selection as Attorney General of California, John Pérez, the former Speaker of the California State Assembly, announced his candidacy to succeed him in the House of Representatives. He soon withdrew from the race, citing a recent health diagnosis.

Declared

 * Robert Lee Ahn, attorney and Los Angeles City planning commissioner
 * Vanessa Aramayo, former congressional aide and former California Assembly aide
 * Maria Cabildo, former Los Angeles City planning commissioner and director of homeless initiatives at the LA County Community Development Commission & Housing Authority, Co-Founder of East LA Community Corporation
 * Alejandra Campoverdi, former White House aide for U.S. President Barack Obama
 * Arturo Carmona, former Bernie Sanders presidential campaign staff member
 * Wendy Carrillo, labor activist and radio host
 * Ricardo De La Fuente, businessman and son of 2016 presidential candidate Rocky De La Fuente
 * Yolie Flores, former Los Angeles Unified School District board member
 * Melissa "Sharkie" Garza, filmmaker and businesswoman
 * Jimmy Gomez, state assemblyman
 * Sara Hernandez, former public school teacher, attorney, nonprofit founder, and former district director and special counsel to LA City Council Member Jose Huizar.
 * Steven Mac, Los Angeles County Deputy District Attorney
 * Sandra Mendoza, candidate for the State Assembly in 2014 and 2016
 * Raymond Meza, SEIU labor organizer
 * Armando Sotomayor, activist
 * Richard Joseph Sullivan, attorney
 * Tracy Van Houten, aerospace engineer
 * Tenaya Wallace, public relations strategist

Withdrew

 * John Pérez, former Speaker of the California State Assembly
 * Dr. Jason Ahn, Physician at UCLA

Declined

 * Gil Cedillo, Los Angeles City Councilman
 * Kevin de León, State Senator and President pro tempore of the California State Senate
 * Monica Garcia, Los Angeles School Board member
 * José Huizar, Los Angeles City Councilman
 * Jesse Leon, aide to Los Angeles City Councilman José Huizar
 * Holly Mitchell, state senator
 * Nick Pacheco, former Los Angeles City Councilman and candidate for Los Angeles County District Attorney in 2004
 * David Ryu, Los Angeles City Councilman
 * Miguel Santiago, state assemblyman

Declared

 * William Rodriguez Morrison, apartment building manager and perennial candidate

Declared

 * Kenneth Mejia, certified public accountant and candidate for this seat in 2016

Declared

 * Angela McArdle, litigation paralegal and legal aide

Declared

 * Mark Padilla, law office administrator