CA-4

Name: CA-4 Election 2018
Start: 2018-11-06
Location: California

California — U.S. House District 4

Nov 6, 2018California2 candidates

Challengers

Tom McClintock

(R)Won

Republican incumbent representing California's 5th congressional district since 2009; former California state legislator.

Vote share54.1%

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Jessica Morse

(D)Lost

Natural resources manager and former Deputy Secretary of the California Natural Resources Agency with a background in international development and defense.

Vote share45.9%

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Campaign finance data not yet available for this race.

Recent Coverage

Chairmen Jordan and McClintock Investigate New Colorado Policy Forcing Attorneys to ...

House Judiciary Committee RepublicansApr 14, 2026

mixed

U.S. House investigates Colorado rule requiring lawyers to block immigration enforcement

WorldNetDailyApr 14, 2026

mixed

House probes Colorado rule pressuring lawyers to block immigration enforcement

Off The PressApr 14, 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

Challengers

Recent Coverage

House Votes to Preserve Deportation Protections for Haitians, Rebuking Trump

Congress presses Colorado court about rule tied to immigration enforcement

As worker silicosis deaths mount, GOP moves to shield companies from liability

Chairmen Jordan and McClintock Investigate New Colorado Policy Forcing Attorneys to ...

U.S. House investigates Colorado rule requiring lawyers to block immigration enforcement

House probes Colorado rule pressuring lawyers to block immigration enforcement

Election History