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D Democratic · Incumbent · U.S. House 4, California · Nov 3, 2026

Mike
Thompson

Democratic incumbent Mike Thompson seeks reelection in California's 4th Congressional District in 2026.

Researched checked 6 d ago
sources
19
positions
11
endorsements
43
mikethompsonforcongress.com ↗(opens in a new tab) X(opens in a new tab)
Opponent Eric Jones D Compare race →

Background

Mike Thompson is a Democratic U.S. Representative serving California's 4th Congressional District, a seat he has held since 1999. Born and raised in St. Helena, California, he served in the U.S. Army from 1969 to 1972, including a tour in Vietnam, before working as a maintenance supervisor at Beringer Winery and later as a teacher at San Francisco State University and California State University, Chico. 14

Thompson attended Napa Valley Community College and earned both a B.A. (1982) and an M.A. in Public Administration (1996) from California State University, Chico. Before his congressional career, he served in the California State Senate representing the 2nd District from 1990 to 1998, where he chaired the State Senate Budget Committee. 14

Thompson is the incumbent in California's 4th Congressional District and is seeking reelection in the November 2026 general election. CalMatters identified him as the incumbent in its 2026 California U.S. House election guide. 320

At a glance

Party
Democratic · Incumbent
Running for
U.S. House · District 4, California
Election
Nov 3, 2026
Current office
U.S. Representative, California's 4th Congressional District
Website
mikethompsonforcongress.com(opens in a new tab)

Where they stand

Each position links to the page it was drawn from. Quotes are verbatim.

Voting record

How Mike Thompson voted in Congress: 118th Congress (2023–24) and 119th Congress (2025–26), Jan 3, 2023 to Sep 16, 2026. From the official House and Senate roll call records.

roll call votes
1,909
missed
0.5%
with their party’s majority
98%

Recent key votes

  • Sep 16, 2026 · House · S2403 · Economy & jobs
    Retire through Ownership Act
    On Motion to Suspend the Rules and Pass · Passed
    Official roll call ↗(opens in a new tab)
    Yes
  • Sep 16, 2026 · House · HR9497 · Climate & energy
    Water Resources Development Act
    On Motion to Suspend the Rules and Pass, as Amended · Passed
    Official roll call ↗(opens in a new tab)
    Yes
  • Sep 16, 2026 · House · HR9340 · Climate & energy
    Ratepayer Protection Act
    On Motion to Suspend the Rules and Pass, as Amended · Passed
    Official roll call ↗(opens in a new tab)
    Yes
  • Sep 16, 2026 · House · HJRES213 · Climate & energy
    Providing for congressional disapproval under chapter 8 of title 5, United States Code, of the rule issued by the Environmental Protection Agency relating to the “California State Nonroad Engine Pollution Control Standards; Commercial Harbor Craft Regulations; Notice of Decision”
    On Passage · Passed
    Official roll call ↗(opens in a new tab)
    No
  • Sep 16, 2026 · House · HR10326 · Crime & public safety
    PROOF Act
    On Passage · Passed
    Official roll call ↗(opens in a new tab)
    No
  • Sep 16, 2026 · House · HR9576 · Crime & public safety
    National Fraud Enforcement Division Act
    On Passage · Passed
    Official roll call ↗(opens in a new tab)
    Yes
  • Sep 15, 2026 · House · HJRES210 · Climate & energy
    Providing for congressional disapproval under chapter 8 of title 5, United States Code, of the rule submitted by the Environmental Protection Agency relating to “California State Nonroad Engine Pollution Control Standards; Ocean-Going Vessels At-Berth; Notice of Decision”
    On Passage · Passed
    Official roll call ↗(opens in a new tab)
    No
  • Sep 15, 2026 · House · HR9500 · Taxes & budget
    Tax Relief for Fraud Victims Act
    On Motion to Suspend the Rules and Pass, as Amended · Passed
    Official roll call ↗(opens in a new tab)
    Yes

Key votes are final decisions on bills and joint resolutions, and top nominations. Software sorts each into an issue from its official title, so check the roll call. All 1,909 votes →

Timeline

  1. Oct 8
    news
    Thompson leads 174 House members calling on DOJ to enforce youth handgun law

    Rep. Mike Thompson led 174 House members in calling on the Department of Justice to enforce the youth handgun law, according to a press release dated October 8, 2026.

    Mike Thompson Leads 174 Members Calling on DOJ to Enforce ... · Oct 8, 2026 (opens in a new tab)
  2. Oct 8
    debate
    Thompson and Jones face off at League of Women Voters forum in Woodland

    Thompson and Jones met for a second public forum hosted by the League of Women Voters in Woodland, covering campaign money, living costs, health care, housing, immigration, farming, water infrastructure and military spending. Local coverage described it as the last scheduled matchup before Election Day.

    Rep. Mike Thompson and challenger Eric Jones face off in League of Women Voters congressional forum · Oct 11, 2026 (opens in a new tab)
  3. Oct 7
    debate
    Thompson and Jones debate at KCRA; Thompson promotes American Affordability Act, sparring over healthcare and tech money

    At a KCRA-hosted debate, Thompson and Jones discussed affordability, health care, data centers, agriculture and immigration. Thompson promoted his American Affordability Act and stressed community input on data centers. Thompson alleged Jones's former companies had been fined for improper billing; Jones denied this and accused Thompson of taking contributions from Amazon, Meta and tech industries.

    Mike Thompson, Eric Jones meet for Congressional District 4 debate · Oct 8, 2026 (opens in a new tab)
  4. Oct 6
    endorsement
    Press Democrat editorial board endorses Thompson, citing experience and bipartisan work

    The Press Democrat's editorial board endorsed incumbent Mike Thompson for California's 4th Congressional District, citing his congressional experience and record of working across party lines.

    Endorsement: California's 4th Congressional District deserves ... · Oct 6, 2026 (opens in a new tab)
  5. Sep 30
    endorsement
    Indivisible Sonoma County endorses Thompson, citing support for single-payer health care

    Indivisible Sonoma County announced its endorsement of Mike Thompson and noted it was pleased by his support for single-payer health care legislation.

    Indivisible Sonoma County Recommends 2 · Sep 30, 2026 (opens in a new tab)
  6. Sep 18
    news
    Thompson joins 106 lawmakers urging House action on AI safeguards

    Rep. Mike Thompson joined 106 fellow lawmakers in urging the House to take action on AI safeguards, according to a press release dated September 18, 2026.

    Press Release: Mike Thompson Joins 106 Lawmakers Urging House Action on AI Safeguards | Stock News · Sep 18, 2026 (opens in a new tab)
  7. Sep 18
    news
    Thompson joins amicus brief challenging mail-in voting restrictions

    Rep. Mike Thompson joined an amicus brief challenging mail-in voting restrictions, according to a press release dated September 18, 2026.

    Press Release: Rep. Mike Thompson Joins Amicus Brief ... · Sep 18, 2026 (opens in a new tab)
  8. Sep 14
    news
    Thompson announces $4 million USDA funding to combat glassy-winged sharpshooter in California

    Thompson's office announced USDA emergency funding to address the invasive glassy-winged sharpshooter pest, which spreads Pierce's disease and threatens California's grape-growing and agricultural industries. The funding followed a request by Thompson and other California lawmakers.

    Press Release: Rep. Mike Thompson Announces $4 Million USDA Funding for Glassy-Winged Sharpshooter Response in California | Stock News · Sep 14, 2026 (opens in a new tab)
  9. Jul 15
    filing
    Thompson files Q2 FEC report showing $719K raised, $1.4M spent, $1.1M cash on hand

    Thompson's second-quarter 2026 FEC disclosure, filed July 15, reported $719,000 raised during the quarter, $1.4 million spent, and $1.1 million cash on hand at the close of the period. About 50.6% of receipts came from individual donors.

    Press Release: Rep. Mike Thompson Announces $4 Million USDA Funding for Glassy-Winged Sharpshooter Response in California | Stock News · Sep 14, 2026 (opens in a new tab)
  10. Jun 2
    filing
    Thompson and Jones advance from top-two primary; Thompson wins 40.97%, Jones 22.23%

    In California's 4th Congressional District top-two primary, incumbent Mike Thompson received 40.97% of the vote and Eric Jones received 22.23%, with Republican Ray Riehle at 20.73%. Both Thompson and Jones advanced to the November 3 general election.

    2026 California's 4th Congressional District Election | Smarter.Vote · Oct 8, 2026 (opens in a new tab)

Endorsements

  • Davis College Democrats organization
    Named in campaign news release dated April 21, 2026. mikethompsonforcongress.com
  • Rep. Hakeem Jeffries official
    Listed on campaign's partial 2025–2026 endorsement page. mikethompsonforcongress.com
  • California College Democrats organization
    Listed on campaign's partial 2025–2026 endorsement page. mikethompsonforcongress.com
  • International Brotherhood of Teamsters Joint Council 7 union
    Listed on campaign's partial 2025–2026 endorsement page. mikethompsonforcongress.com
  • VoteVets organization
    Listed on campaign's endorsement page; also named in campaign news release dated April 21, 2026. mikethompsonforcongress.com
  • Lt. Gov. Eleni Kounalakis official
    Listed on campaign's partial 2025–2026 endorsement page. mikethompsonforcongress.com
  • Rep. Nancy Pelosi official
    Listed on campaign's partial 2025–2026 endorsement page. mikethompsonforcongress.com
  • California Young Democrats organization
    Listed on campaign's endorsement page; also named in campaign news release dated April 21, 2026. mikethompsonforcongress.com
  • AFSCME California union
    Listed on campaign's partial 2025–2026 endorsement page. mikethompsonforcongress.com
  • Equality California organization
    Listed on campaign's partial 2025–2026 endorsement page. mikethompsonforcongress.com
  • Assembly Majority Leader Cecilia Aguiar-Curry official
    Listed on campaign's partial 2025–2026 endorsement page. mikethompsonforcongress.com
  • Rep. Pete Aguilar official
    Listed on campaign's partial 2025–2026 endorsement page. mikethompsonforcongress.com
  • SEIU California union
    Listed on campaign's endorsement page; also named in campaign news release dated April 21, 2026. mikethompsonforcongress.com
  • United Auto Workers Region 6 union
    Listed on campaign's partial 2025–2026 endorsement page. mikethompsonforcongress.com
  • California Farm Bureau organization
    Named in campaign news release dated April 21, 2026. mikethompsonforcongress.com
  • State Senator Christopher Cabaldon official
    Listed on campaign's partial 2025–2026 endorsement page. mikethompsonforcongress.com
  • Rep. John Garamendi official
    Listed on campaign's partial 2025–2026 endorsement page. mikethompsonforcongress.com
  • SEIU United Healthcare Workers union
    Listed on campaign's partial 2025–2026 endorsement page. mikethompsonforcongress.com
  • Sierra Club organization
    Listed on campaign's endorsement page; also named in campaign news release dated April 21, 2026. mikethompsonforcongress.com
  • Planned Parenthood Action Fund organization
    Listed on campaign's endorsement page; also named in campaign news release dated April 21, 2026. mikethompsonforcongress.com
  • State Senate President Pro Tempore Emeritus Mike McGuire official
    Listed on campaign's partial 2025–2026 endorsement page. mikethompsonforcongress.com
  • U.S. Senator Alex Padilla official
    Listed on campaign's partial 2025–2026 endorsement page. mikethompsonforcongress.com
  • Rep. Jared Huffman official
    Listed on campaign's partial 2025–2026 endorsement page. mikethompsonforcongress.com
  • SEIU 2015 union
    Listed on campaign's partial 2025–2026 endorsement page. mikethompsonforcongress.com
  • League of Conservation Voters organization
    Listed on campaign's partial 2025–2026 endorsement page. mikethompsonforcongress.com
  • U.S. Senator Adam Schiff official
    Listed on campaign's partial 2025–2026 endorsement page. mikethompsonforcongress.com
  • Rep. Zoe Lofgren official
    Listed on campaign's partial 2025–2026 endorsement page. mikethompsonforcongress.com
  • California Federation of Labor Unions–AFL-CIO union
    Listed on campaign's endorsement page; also named in campaign news release dated April 21, 2026. mikethompsonforcongress.com
  • NRDC Action Fund organization
    Listed on campaign's partial 2025–2026 endorsement page. mikethompsonforcongress.com
  • Gov. Gavin Newsom official
    Listed on campaign's partial 2025–2026 endorsement page. mikethompsonforcongress.com
  • U.S. Senator Catherine Cortez Masto official
    Listed on campaign's partial 2025–2026 endorsement page. mikethompsonforcongress.com
  • BOLD PAC organization
    Listed on campaign's partial 2025–2026 endorsement page. mikethompsonforcongress.com
  • California Federation of Teachers union
    Listed on campaign's partial 2025–2026 endorsement page. mikethompsonforcongress.com
  • Giffords PAC organization
    Listed on campaign's partial 2025–2026 endorsement page. mikethompsonforcongress.com
  • U.S. Senator Ben Ray Luján official
    Listed on campaign's partial 2025–2026 endorsement page. mikethompsonforcongress.com
  • California Democratic Party organization
    Listed on campaign's endorsement page; also named in campaign news release dated April 21, 2026. mikethompsonforcongress.com
  • California Teachers Association union
    Listed on campaign's partial 2025–2026 endorsement page. mikethompsonforcongress.com
  • Everytown for Gun Safety organization
    Listed on campaign's partial 2025–2026 endorsement page. mikethompsonforcongress.com
  • State Senator Angelique V. Ashby official
    Listed on campaign's partial 2025–2026 endorsement page. mikethompsonforcongress.com
  • Rep. Ted Lieu official
    Listed on campaign's partial 2025–2026 endorsement page. mikethompsonforcongress.com
  • SEIU 1021 union
    Listed on campaign's partial 2025–2026 endorsement page. mikethompsonforcongress.com
  • The Press Democrat Editorial Board newspaper
    Editorial recommended 'a yes vote for Mike Thompson' for California's 4th Congressional District. pressdemocrat.com · Oct 6, 2026
  • Sacramento Bee Editorial Board newspaper
    Editorial stated: 'He has our endorsement.' sacbee.com · May 2, 2026

Past elections

General election results for federal office, from the Federal Election Commission.

YearSeatResultVotesShare
2022U.S. House CA-04 · DWon176,90067.8%
2020U.S. House CA-05 · DWon271,23376.1%
2018U.S. House CA-05 · DWon205,86078.9%
2016U.S. House CA-05 · DWon224,52676.9%

Covers the 2016 to 2022 general elections. The FEC has not yet published 2024 congressional results.

Campaign finance

Totals filed with the Federal Election Commission for the 2026 election cycle.

Raised
$4.20M
Spent
$4.34M
Cash on hand
$1.08M

As of Jun 30, 2026. Filings are periodic, so recent money may not be included yet. ↳ FEC record H8CA01109(opens in a new tab)

Sources 19

  1. [1] Rep. Mike Thompson and challenger Eric Jones face off in League of Women Voters congressional forum(opens in a new tab) Oct 11, 2026
  2. [2] 2026 California's 4th Congressional District Election | Smarter.Vote(opens in a new tab) Oct 8, 2026
  3. [3] Mike Thompson Leads 174 Members Calling on DOJ to Enforce ...(opens in a new tab) Oct 8, 2026
  4. [4] Mike Thompson, Eric Jones meet for Congressional District 4 debate(opens in a new tab) Oct 8, 2026
  5. [5] Endorsement: California's 4th Congressional District deserves ...(opens in a new tab) Oct 6, 2026
  6. [6] Endorsements(opens in a new tab) Oct 6, 2026
  7. [7] Issues(opens in a new tab) Oct 3, 2026
  8. [8] Indivisible Sonoma County Recommends 2(opens in a new tab) Sep 30, 2026
  9. [9] Press Release: Mike Thompson Joins 106 Lawmakers Urging House Action on AI Safeguards | Stock News(opens in a new tab) Sep 18, 2026
  10. [10] Press Release: Rep. Mike Thompson Joins Amicus Brief ...(opens in a new tab) Sep 18, 2026
  11. [11] Press Release: Rep. Mike Thompson Announces $4 Million USDA Funding for Glassy-Winged Sharpshooter Response in California | Stock News(opens in a new tab) Sep 14, 2026
  12. [12] Rep. Mike Thompson hosts two town halls in Yolo County(opens in a new tab) May 29, 2026
  13. [13] Endorsing a proven leader for California's 4th District race(opens in a new tab) May 2, 2026
  14. [14] Rep. Mike Thompson releases first TV add for Primary Election ...(opens in a new tab) Apr 21, 2026
  15. [15] Thompson Votes to Protect Communities and Provide Law Enforcement with Critical Resources(opens in a new tab) Sep 22, 2022
  16. [16] Civil Rights(opens in a new tab) Aug 23, 2022
  17. [17] Defense | Representative Mike Thompson - House.gov(opens in a new tab) Aug 23, 2022
  18. [18] Energy & Environment(opens in a new tab) Aug 23, 2022
  19. [19] Thompson Demands Vote on Background Checks Bill(opens in a new tab) Feb 27, 2018
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