a jungle, or top-two primary system
, meaning that everyone from both parties runs in the same primary and the top two advance to the general. Because California is a heavily Democratic state, many elections will be a Democrat vs. a Democrat.located in the Simi Valley area, to fill the seat vacated by Rep. Katie Hill with her December resignation from the House. The top two finishers will advance to a special general election on May 12, 2020.
California's 53th district, a safe Democratic seat, is holding a jungle primary to determine the nominees who will run to replace retiring Democratic Rep. Susan Davis. There will also be important jungle primaries to watch in some of the seats Democrats flipped in the 2018 midterms, including California's 10th and 21st districts in the Central Valley, and the 39th, 45, and 48th districts overlapping Orange County. to follow all the action.