The primary election in California's 48th Congressional District is a critical battleground for control of Congress, with Republican Jim Desmond expected to advance. Three Democrats—Marni von Wilpert, Brandon Riker, and Ammar Campa-Najjar—are competing for the chance to face him in November.
- Von Wilpert, a San Diego city councilmember, emphasizes public safety and labor rights, with endorsements from major unions. - Riker, an economist, is self-funding a grassroots campaign focused on economic inequality.
- Campa-Najjar, a Navy Reserve officer and progressive, faces heavy outside spending against him but has support from some Democratic leaders. The outcome will be shaped by national redistricting battles and local voter sentiment, with Desmond's incumbency and Trump endorsement giving him a strong advantage.