CA-4

Name: CA-4 Election 2026
Start: 2026-11-03
Location: California

California — U.S. House District 4

Nov 3, 2026California2 candidates

Incumbent

Mike Thompson

(D)Incumbent

In office since 1999 · 14 terms

Participation

100%

Party Unity

97%

Bipartisan

Coverage Scorecard

Net +2914 votes

Good Look (9)Bad Look (5)

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Mike Thompson

(D)Incumbent

Since 1999

Participation

100%

Party Unity

97%

Bipartisan

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Challengers

Eric Jones

(D)

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Campaign finance data not yet available for this race.

Recent Coverage

RFK Jr. touts new food policies but avoids vaccines in remarks to Congress

Bangor Daily NewsApr 16, 2026

mixed

RFK Jr. Couldn’t Sidestep Vaccine Landmines in First of Many Congressional Hearings

NOTUSApr 16, 2026

mixed

House Democrats Hold ‘Shadow Hearing’ in San Francisco to Defend Elections

ww2.kqed.orgApr 9, 2026

mixed

Election History

2024

2022

2020

2018

2026

Mike Thompson(D)N/A

Eric Jones(D)N/A

2024

Mike Thompson(D)66.5%

John Munn(R)33.5%

2022

Mike Thompson(D)67.8%

Matt Brock(R)32.2%

2020

Tom McClintock(R)55.9%

Brynne S Kennedy(D)44.1%

2018

Tom McClintock(R)54.1%

Jessica Morse(D)45.9%

Campaign finance data sourced from FEC filings. Election results from MIT Election Lab. ChamberLight is not an official government source.

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CA-4

Incumbent

Challengers

Recent Coverage

RFK Jr. touts new food policies but avoids vaccines in remarks to Congress

RFK Jr. Couldn’t Sidestep Vaccine Landmines in First of Many Congressional Hearings

House Democrats Hold ‘Shadow Hearing’ in San Francisco to Defend Elections

Election History