Two Democrats will run on election day: Assemblyman Jimmy Gomez and former L.A. city planning commissioner Robert Lee Ahn. No Republicans will run. They are Jimmy Gomez and Robert Lee Ahn.
Summary: Replacing Democrat Xavier Becerra, who is now CA Attorney General. Becerra ran unopposed in 2016. In the 2016 presidential election, Hillary Clinton won the district 84% to 11%. House District 34 is within Los Angeles.
Robert Lee Ahn: http://ahnforcongress.com
Jimmy Gomez: https://jimmygomezforcongress.com