Incumbent Mike Thompson (D) and Eric Jones (D) advanced from the top-two primary for California's 4th Congressional District on June 2, 2026
Incumbent Mike Thompson (D) and Eric Jones (D) advanced from the top-two primary for California's 4th Congressional District on June 2, 2026. Six Republicans and one independent candidate also ran. As of March 2026, Thompson (D) and Jones (D) led in fundraising and local media attention.
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