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Who is my U.S. representative in CA-04?
If you're in California's 4th Congressional District (CA-04), your current U.S. representative is Mike Thompson, a Democrat. He has represented the district since 1999, and following California's redistricting, the current CA-04 includes all or parts of Lake, Napa, Solano, Sonoma, and Yolo Counties. Representative Mike Thompson +1 If you're not certain you're actually in CA-04, tell me your ZIP code or city and I can verify your congressional district and representative.
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accurate
Judge model claude-opus-4-8
The response correctly identifies Mike Thompson as the U.S. representative for CA-04, matching the ground truth.
Human
not reviewed
Final
accurate
Ground truth
representative: Mike Thompson
clerk.house.gov 100
as of 2026-07-07