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2026 candidates we're tracking in CA-4
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Eric Jones
Democratic
Jones grew up in a military family and is a first-generation college graduate who went on to build companies in healthcare and education that he says lowered healthcare costs and expanded access to mental health services, per the campaign site. He later founded a nonprofit focused on online free speech before moving to Napa to raise his family, per the campaign site.
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Mike Thompson
Democratic
Incumbent
Mike Thompson represents California's 4th Congressional District, covering all or parts of Lake, Napa, Solano, Sonoma and Yolo counties, per his official House biography. He serves on the House Committee on Ways and Means as Ranking Member of the Subcommittee on Tax and as a senior member of the Health Subcommittee. No campaign website was found as of September 7, 2026.
About this race
California's 4th Congressional District elects one member of the U.S. House of Representatives to a two-year term. Every House seat in the country is on the ballot in 2026. The California primary is Tuesday, June 2, 2026, and the general election is Tuesday, November 3, 2026.