California’s June 2 top-two primary for the 4th Congressional District featured incumbent Democrat Mike Thompson seeking his 15th term against a crowded field that included another Democrat, Eric Jones, and six Republicans. Thompson led in fundraising and name recognition, while Jones positioned himself as a challenger drawing support from progressive and youth-mobilization networks. The Republican vote fragmented across multiple candidates, leaving none positioned to finish in the top two. Partial and nearly complete results show Thompson and Jones advancing to the November general election under California’s nonpartisan primary rules. The secretary of state has until July 10 to certify final tallies, after which any remaining procedural questions for the market would resolve.