California's 4th Congressional District election, 2026
All U.S. House districts, including the 4th Congressional District of California, are holding elections in 2026. The general election is November 3, 2026. The primary is June 2, 2026. The filing deadline was March 6, 2026. The outcome of this race will affect the partisan balance of the U.S. House of Representatives in the 120th Congress. All 435 U.S. House districts are up for election.
Currently, Republicans have a 218-214 majority with three vacancies in the chamber.[1] To read more about the U.S. House elections taking place this year, click here. Ballotpedia identified the June 2 top-two primary as a battleground primary. For more on the top-two primary, click here. For more information about the primaries in this election, click on the links below:
Candidates and election results
General election
The primary will occur on June 2, 2026. The general election will occur on November 3, 2026. General election candidates will be added here following the primary.
Nonpartisan primary election
Nonpartisan primary for U.S. House California District 4
The following candidates are running in the primary for U.S. House California District 4 on June 2, 2026.
Candidate | ||
| Mike Thompson (D) | ||
| Sharon Brown (R) | ||
| Heath Fulkerson (R) | ||
| Mandy Ghusar (R) | ||
| Eric Jones (D) | ||
| Jimih Jones (R) | ||
| L. John MacKenzie (R) | ||
Trevor Merrell (D) ![]() | ||
| Raymond Riehle (R) | ||
| Thomas Roach (No party preference) | ||
John Wesley Tyler (No party preference) ![]() | ||
Chuck Uribe (R) ![]() | ||
= candidate completed the Ballotpedia Candidate Connection survey. | ||||
| If you are a candidate and would like to tell readers and voters more about why they should vote for you, complete the Ballotpedia Candidate Connection Survey. | ||||
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June 2 top-two primary
Ballotpedia identified the June 2 top-two primary as a battleground primary. For more on the top-two primary, click here.
Three Democrats, four Republicans, and one independent candidate are running in the top-two primary for California's 4th Congressional District on June 2, 2026. As of March 2026, incumbent Mike Thompson (D) and Eric Jones (D) led in fundraising and local media attention.[2][3]
Local political observers describe the primary in terms of the ideological and generational contrast between Thompson and Jones. The San Francisco Chronicle's Joe Garofali described the primary as "another example of a younger, well-funded Bay Area Democrat taking on an entrenched candidate as the Democratic Party grapples with how to win back voters," referring to the party's losses at the national level in the 2024 elections.[3] Politico's Jeremy B. White said Jones is "hoping to exploit a rapidly shifting media landscape that makes it easier for lesser-known candidates to break through, as Zohran Mamdani did in New York’s mayoral primary with viral campaign videos."[4] The Press Democrat's Phil Barber said, "Democrats hold an overwhelming edge in voter registration in the district, so the June primary is set to decide the likely frontrunner in the November election."[5]
Thompson was first elected to the House in 1998. He earlier served eight years in the California Senate. Thompson is a vineyard owner. Thompson says he is running because "[w]ith the outcome of the last election and what’s happened since then with this (Donald Trump) administration and the Republican majority, it’s absolutely imperative that I continue the work I’ve started," referring to his position on the House Ways and Means Committee.[2] The Democratic Party of California endorsed Thompson.[6]
Jones is a former executive at an investment firm and the founder of the American Dream Institute, a group describing itself as "a first-of-its-kind digital engagement engine dedicated to helping the Democratic Party rebuild trust with young working Americans."[7] Jones says he is running "to restore the American Dream for every family — not just the wealthy few."[8] Our Revolution, an organization that advocates for the policies of Sen. Bernie Sanders (I-Vt.), endorsed Jones.[9]
Also running in the primary are Trevor Merrell (D), Sharon Brown (R), Heath Fulkerson (R), Mandy Ghusar (R), John MacKenzie (R), and John Wesley Tyler (I).
In a top-two primary, all candidates running for a given office appear on the same ballot. The top two finishers—regardless of partisan affiliation—advance to the general election. One Democrat and one Republican have advanced from every top-two primary in the 4th District since 2016.
The primary is taking place in the context of redistricting in California that changed the 4th District's boundaries from those used in 2024. Inside Elections' Nathaniel Rakich said the 2026 version of the 4th District favors Democrats overall but does so by a narrower margin than the district lines in use in 2024.[10] As of March 2026, major election forecasters rated the general election Solid/Safe Democratic.
Candidate profiles
This section includes candidate profiles that may be created in one of two ways: either the candidate completed Ballotpedia's Candidate Connection survey, or Ballotpedia staff may compile a profile based on campaign websites, advertisements, and public statements after identifying the candidate as noteworthy. For more on how we select candidates to include, click here.
Party: Democratic Party
Incumbent: Yes
Political Office:
- U.S. House of Representatives (Assumed office: 1999)
- California State Senate (1990–1998)
Biography: Thompson obtained a bachelor's and a master's degree from California State University, Chico. Thompson served in the U.S. Army during the Vietnam War, attaining the rank of staff sergeant. As of the 2026 elections, he owned a vineyard.
Show sources
Sources: Mike Thompson campaign website, "Congressman Mike Thompson Announces Re-Election Campaign, Hundreds Attend," September 13, 2025; Mike Thompson campaign website, "Biography," accessed March 9, 2026; Mike Thompson campaign website, "Biography," accessed March 9, 2026; Biographical Directory of the United States Congress, "THOMPSON, Michael," accessed March 9, 2026; Internet Archive, "Once a Soldier....Always a Soldier; Soldiers in the 112th Congress," accessed March 24, 2026
Party: Democratic Party
Incumbent: No
Political Office: None
Biography: Jones obtained a bachelor's degree from Yale University. Jones was a partner at Dragoneer Investment Group. Jones is the founder of the Rachel and Eric Jones Foundation and of the American Dream Institute, an organization his campaign website described as "committed to countering partisan extremism, political disinformation, and the forces that seek to undermine democracy, while promoting a forward-looking, aspirational vision for the country."
Show sources
Do you have a photo that could go here? Click here to submit it for this profile!
Party: Democratic Party
Incumbent: No
Party: No party preference
Incumbent: No
Submitted Biography: "I was born in 1966 in rural Sutter County north of Sacramento. I had a middle-class childhood, grew up on farms usually near the river. Here I learned to swim, to fish, to hunt and survive. I worked hard as a child every summer. I was picking corn and peaches when I was twelve and was a full ranch hand by sixteen. I graduated high school near the top of my class in 1983. After a failed attempt at college, I joined the working class and landed on Custom Car Stereo and Cell Phone Installations. I returned to college in 1998, studying Communication and Philosophy at Fresno State. Joining the FSU debate team brought me to a career in local government as an Administrative Analyst for the City of Lemoore, in Kings County, CA. For seven years, I was in charge of multiple top-level projects and city management responsibilities. I drafted legislation, wrote millions of dollars' worth of grants, administered large public construction projects, managed the human resources department and oversaw the health care benefits for nearly 200 employees. I learned government from the inside out. I also taught night classes then in Argumentation & Debate and Public Speaking at the local junior college. In 2009 I decided to change careers once more to become a teacher full time. After Credentialing in Sacramento, I landed a job teaching 6th grade math and science in Clearlake. In 2017, I left grammar school and became the Automotive Instructor at Lower Lake High School for the same district."
Do you have a photo that could go here? Click here to submit it for this profile!
Party: Republican Party
Incumbent: No
Submitted Biography: "I am Chuck Uribe and I'm running for California's 4th Congressional District. I am a 40 year classroom teacher, a sitting elected school board member (separate school district), and military veteran. I have extensive experience living, working, and going to school overseas."
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Candidate profiles
There are currently no candidate profiles created for this race. Candidate profiles will appear here as they are created. Encourage the candidates in this race to complete Ballotpedia's Candidate Connection survey so that their profile will appear here.
Voting information
- See also: Voting in California
Ballotpedia's Candidate Connection survey responses
Ballotpedia asks all federal, state, and local candidates to complete a survey and share what motivates them on political and personal levels. Candidates are asked three required questions for this survey, but they may answer additional optional questions as well.
No candidate in this race has completed Ballotpedia's Candidate Connection survey. Ballotpedia is seeking 100 percent participation so voters can learn more about all the candidates on their ballots.
Campaign finance
| Name | Party | Receipts* | Disbursements** | Cash on hand | Date |
|---|---|---|---|---|---|
| Mike Thompson | Democratic Party | $2,037,569 | $1,313,154 | $1,933,903 | As of December 31, 2025 |
| Eric Jones | Democratic Party | $2,591,551 | $789,151 | $1,802,400 | As of December 31, 2025 |
| Trevor Merrell | Democratic Party | $0 | $0 | $0 | Data not available*** |
| Sharon Brown | Republican Party | $7,000 | $2,780 | $4,220 | As of December 31, 2025 |
| Heath Fulkerson | Republican Party | $0 | $0 | $0 | Data not available*** |
| Mandy Ghusar | Republican Party | $7,000 | $3,789 | $3,211 | As of December 31, 2025 |
| Jimih Jones | Republican Party | $0 | $0 | $0 | Data not available*** |
| L. John MacKenzie | Republican Party | $7,000 | $2,780 | $4,220 | As of December 31, 2025 |
| Raymond Riehle | Republican Party | $90,180 | $75,019 | $15,701 | As of December 31, 2025 |
| Chuck Uribe | Republican Party | $0 | $0 | $0 | Data not available*** |
| Thomas Roach | No party preference | $0 | $0 | $0 | Data not available*** |
| John Wesley Tyler | No party preference | $1,385 | $1,337 | $48 | As of December 31, 2025 |
|
Source: Federal Elections Commission, "Campaign finance data," 2026. This product uses the openFEC API but is not endorsed or certified by the Federal Election Commission (FEC).
* According to the FEC, "Receipts are anything of value (money, goods, services or property) received by a political committee." |
|||||
General election race ratings
- See also: Race rating definitions and methods
Ballotpedia provides race ratings from four outlets: The Cook Political Report, Inside Elections, Sabato's Crystal Ball, and DDHQ/The Hill. Each race rating indicates if one party is perceived to have an advantage in the race and, if so, the degree of advantage:
- Safe and Solid ratings indicate that one party has a clear edge and the race is not competitive.
- Likely ratings indicate that one party has a clear edge, but an upset is possible.
- Lean ratings indicate that one party has a small edge, but the race is competitive.[11]
- Toss-up ratings indicate that neither party has an advantage.
Race ratings are informed by a number of factors, including polling, candidate quality, and election result history in the race's district or state.[12][13][14]
| Race ratings: California's 4th Congressional District election, 2026 | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Race tracker | Race ratings | ||||||||
| 3/17/2026 | 3/10/2026 | 3/3/2026 | 2/24/2026 | ||||||
| The Cook Political Report with Amy Walter | Solid Democratic | Solid Democratic | Solid Democratic | Solid Democratic | |||||
| Decision Desk HQ and The Hill | Pending | Pending | Pending | Pending | |||||
| Inside Elections with Nathan L. Gonzales | Solid Democratic | Solid Democratic | Solid Democratic | Solid Democratic | |||||
| Larry J. Sabato's Crystal Ball | Safe Democratic | Safe Democratic | Safe Democratic | Safe Democratic | |||||
| Note: Ballotpedia reviews external race ratings every week throughout the election season and posts weekly updates even if the media outlets have not revised their ratings during that week. | |||||||||
Ballot access
The table below details filing requirements for U.S. House candidates in California in the 2026 election cycle. For additional information on candidate ballot access requirements in California, click here.
| Filing requirements for U.S. House candidates, 2026 | ||||||
|---|---|---|---|---|---|---|
| State | Office | Party | Signatures required | Filing fee | Filing deadline | Source |
| California | U.S. House | All candidates | 40-60 | $1,740 | 3/6/2026 | Source |
District history
The section below details election results for this office in elections dating back to 2020.
General election
General election for U.S. House California District 4
Incumbent Mike Thompson (D) defeated John Munn (R) in the general election for U.S. House California District 4 on November 5, 2024.
Candidate | % | Votes | ||
| ✔ | | Mike Thompson (D) | 66.5 | 227,730 |
| | John Munn (R) ![]() | 33.5 | 114,950 | |
| Total votes: 342,680 | ||||
= candidate completed the Ballotpedia Candidate Connection survey. | ||||
| If you are a candidate and would like to tell readers and voters more about why they should vote for you, complete the Ballotpedia Candidate Connection Survey. | ||||
Do you want a spreadsheet of this type of data? Contact our sales team. | ||||
Nonpartisan primary
Nonpartisan primary election for U.S. House California District 4
Incumbent Mike Thompson (D) and John Munn (R) defeated Andrew Engdahl (D) and Niket Patwardhan (No party preference) in the primary for U.S. House California District 4 on March 5, 2024.
Candidate | % | Votes | ||
| ✔ | | Mike Thompson (D) | 62.5 | 120,736 |
| ✔ | | John Munn (R) ![]() | 30.4 | 58,787 |
| | Andrew Engdahl (D) ![]() | 6.0 | 11,492 | |
| | Niket Patwardhan (No party preference) | 1.1 | 2,116 | |
| Total votes: 193,131 | ||||
= candidate completed the Ballotpedia Candidate Connection survey. | ||||
| If you are a candidate and would like to tell readers and voters more about why they should vote for you, complete the Ballotpedia Candidate Connection Survey. | ||||
Do you want a spreadsheet of this type of data? Contact our sales team. | ||||
Withdrawn or disqualified candidates
- Matt Brock (R)
General election
General election for U.S. House California District 4
Incumbent Mike Thompson (D) defeated Matt Brock (R) in the general election for U.S. House California District 4 on November 8, 2022.
Candidate | % | Votes | ||
| ✔ | | Mike Thompson (D) | 67.8 | 176,900 |
| | Matt Brock (R) | 32.2 | 84,007 | |
| Total votes: 260,907 | ||||
= candidate completed the Ballotpedia Candidate Connection survey. | ||||
| If you are a candidate and would like to tell readers and voters more about why they should vote for you, complete the Ballotpedia Candidate Connection Survey. | ||||
Do you want a spreadsheet of this type of data? Contact our sales team. | ||||
Nonpartisan primary
Nonpartisan primary election for U.S. House California District 4
The following candidates ran in the primary for U.S. House California District 4 on June 7, 2022.
Candidate | % | Votes | ||
| ✔ | | Mike Thompson (D) | 66.2 | 115,041 |
| ✔ | | Matt Brock (R) | 16.3 | 28,260 |
| | Scott Giblin (R) | 9.7 | 16,914 | |
| | Andrew Engdahl (D) ![]() | 5.0 | 8,634 | |
| | Jason Kishineff (Independent) ![]() | 1.4 | 2,477 | |
| Jimih Jones (R) | 1.4 | 2,363 | ||
| Seth Newman (No party preference) (Write-in) | 0.0 | 15 | ||
| Total votes: 173,704 | ||||
= candidate completed the Ballotpedia Candidate Connection survey. | ||||
| If you are a candidate and would like to tell readers and voters more about why they should vote for you, complete the Ballotpedia Candidate Connection Survey. | ||||
Do you want a spreadsheet of this type of data? Contact our sales team. | ||||
General election
General election for U.S. House California District 4
Incumbent Tom McClintock (R) defeated Brynne Kennedy (D) in the general election for U.S. House California District 4 on November 3, 2020.
Candidate | % | Votes | ||
| ✔ | | Tom McClintock (R) | 55.9 | 247,291 |
| | Brynne Kennedy (D) | 44.1 | 194,731 | |
| Total votes: 442,022 | ||||
= candidate completed the Ballotpedia Candidate Connection survey. | ||||
| If you are a candidate and would like to tell readers and voters more about why they should vote for you, complete the Ballotpedia Candidate Connection Survey. | ||||
Do you want a spreadsheet of this type of data? Contact our sales team. | ||||
Nonpartisan primary
Nonpartisan primary election for U.S. House California District 4
The following candidates ran in the primary for U.S. House California District 4 on March 3, 2020.
Candidate | % | Votes | ||
| ✔ | | Tom McClintock (R) | 50.7 | 141,244 |
| ✔ | | Brynne Kennedy (D) | 39.8 | 110,771 |
| | Julianne Benzel (R) ![]() | 4.4 | 12,138 | |
| | Robert Lawton (Independent) | 1.7 | 4,848 | |
| | Jamie Byers (R) ![]() | 1.7 | 4,822 | |
| | Jacob Thomas (R) ![]() | 1.6 | 4,527 | |
| Total votes: 278,350 | ||||
= candidate completed the Ballotpedia Candidate Connection survey. | ||||
| If you are a candidate and would like to tell readers and voters more about why they should vote for you, complete the Ballotpedia Candidate Connection Survey. | ||||
Do you want a spreadsheet of this type of data? Contact our sales team. | ||||
Withdrawn or disqualified candidates
District analysis
Click the tabs below to view information about voter composition, past elections, and demographics in both the district and the state.
- District map - A map of the district before and after redistricting ahead of the 2026 election.
- Competitiveness - Information about the competitiveness of 2026 U.S. House elections in the state.
- Presidential elections - Information about presidential elections in the district and the state.
- State party control - The partisan makeup of the state's congressional delegation and state government.
Below is the district map used in the 2024 election next to the map in place for the 2026 election. Click on a map below to enlarge it.
2024

2026

Partisan Voter Index
Heading into the 2026 elections, based on results from the 2024 and 2020 presidential elections, the Cook Partisan Voter Index for this district is D+17. This meant that in those two presidential elections, this district's results were 17 percentage points more Democratic than the national average. This made California's 4th the 84th most Democratic district nationally.[15]
2024 presidential election results
The table below shows what the vote in the 2024 presidential election was in this district. The presidential election data was compiled by The Downballot.
| Kamala Harris | Donald Trump |
|---|---|
| 55.8% | 41.2% |
Presidential voting history
California presidential election results (1900-2024)
- 16 Democratic wins
- 15 Republican wins
- 1 other win
| Year | 1900 | 1904 | 1908 | 1912 | 1916 | 1920 | 1924 | 1928 | 1932 | 1936 | 1940 | 1944 | 1948 | 1952 | 1956 | 1960 | 1964 | 1968 | 1972 | 1976 | 1980 | 1984 | 1988 | 1992 | 1996 | 2000 | 2004 | 2008 | 2012 | 2016 | 2020 | 2024 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Winning Party | R | R | R | P[16] | D | R | R | R | D | D | D | D | D | R | R | R | D | R | R | R | R | R | R | D | D | D | D | D | D | D | D | D |
Congressional delegation
The table below displays the partisan composition of California's congressional delegation as of March 2026.
| Congressional Partisan Breakdown from California | |||
|---|---|---|---|
| Party | U.S. Senate | U.S. House | Total |
| Democratic | 2 | 43 | 45 |
| Republican | 0 | 7 | 7 |
| Independent | 0 | 1 | 1 |
| Vacancies | 0 | 1 | 1 |
| Total | 2 | 52 | 54 |
State executive
The table below displays the officeholders in California's top four state executive offices as of October 2025.
| Office | Officeholder |
|---|---|
| Governor | |
| Lieutenant Governor | |
| Secretary of State | |
| Attorney General |
State legislature
California State Senate
| Party | As of October 2025 | |
|---|---|---|
| Democratic Party | 30 | |
| Republican Party | 10 | |
| Other | 0 | |
| Vacancies | 0 | |
| Total | 40 | |
California State Assembly
| Party | As of October 2025 | |
|---|---|---|
| Democratic Party | 60 | |
| Republican Party | 20 | |
| Other | 0 | |
| Vacancies | 0 | |
| Total | 80 | |
Trifecta control
California Party Control: 1992-2025
Twenty years with Democratic trifectas • No Republican trifectas
Scroll left and right on the table below to view more years.
| Year | 92 | 93 | 94 | 95 | 96 | 97 | 98 | 99 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Governor | R | R | R | R | R | R | R | D | D | D | D | D | R | R | R | R | R | R | R | D | D | D | D | D | D | D | D | D | D | D | D | D | D | D |
| Senate | D | D | D | D | D | D | D | D | D | D | D | D | D | D | D | D | D | D | D | D | D | D | D | D | D | D | D | D | D | D | D | D | D | D |
| Assembly | D | D | D | S | R | D | D | D | D | D | D | D | D | D | D | D | D | D | D | D | D | D | D | D | D | D | D | D | D | D | D | D | D | D |
See also
External links
Footnotes
- ↑ A majority in the U.S. House of Representatives, when there are no vacancies, is 218 seats.
- ↑ 2.0 2.1 The Press Democrat, "Why rival Democrat Eric Jones thinks he can unseat Mike Thompson, North Bay's senior congressman," September 9, 2025
- ↑ 3.0 3.1 The San Francisco Chronicle, "Another longtime Bay Area House member is getting an intraparty challenge," September 9, 2025
- ↑ Politico, "Dems unleash House primary challenges in war on gerontocracy," September 16, 2025
- ↑ The Press Democrat, "U.S. Capitol police: Member of Eric Jones’ campaign investigated for surveilling Mike Thompson’s Napa County home," December 4, 2025
- ↑ Democratic Party of California, "2026 Primary Election Endorsements," February 22, 2026
- ↑ Yahoo Finance, "American Dream Institute Launches to Help Progressives Win Back Young Americans," August 22, 2025
- ↑ Eric Jones campaign website, "Home page," accessed March 9, 2026
- ↑ Facebook, "Our Revolution on February 23, 2026," accessed March 9, 2026
- ↑ Inside Elections, "A Detailed Analysis of California’s (Maybe) New Congressional Map," August 21, 2025
- ↑ Inside Elections also uses Tilt ratings to indicate an even smaller advantage and greater competitiveness.
- ↑ Amee LaTour, "Email correspondence with Nathan Gonzalez," April 19, 2018
- ↑ Amee LaTour, "Email correspondence with Kyle Kondik," April 19, 2018
- ↑ Amee LaTour, "Email correspondence with Charlie Cook," April 22, 2018
- ↑ Cook Political Report, "2025 Cook PVI℠: District Map and List (119th Congress)," accessed July 1, 2025
- ↑ Progressive Party
