California's new congressional maps, approved through a statewide ballot measure, are being tested in the 2026 primaries. The maps aim to flip Republican-held seats to Democrats.
- Incumbent Republicans Ken Calvert and Young Kim are competing in the same district in Southern California. - In District 48, a Democratic-leaning district could see Democrats miss the general election due to a crowded field.
- Key races include challenges to incumbents in the Central Valley, San Francisco, and Sacramento. The outcome will shape the balance of power in the U.S.
House.