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2026 candidates we're tracking in CA-10
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Mark DeSaulnier
Democratic
Incumbent
Mark DeSaulnier has represented California's 10th Congressional District since 2023 and represented the 11th District for eight years before that, per the campaign site. He serves on three House committees, including Transportation and Infrastructure, per the campaign site.
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Jeff Frese
Republican
Jeff Frese is the Republican nominee for California's 10th Congressional District. He supports eight-year term limits for members of Congress and opposes one-size-fits-all federal housing mandates, per his campaign profile. No campaign website was found as of September 7, 2026.
About this race
California's 10th 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.