Mike Thompson
U.S. Representative, CA-4 since 1999. Lost re-election in 2026; leaves office in January 2027.
U.S. Representative, CA-4Born 1951Screenwriter
- In office
- 27 yrs
- Since 1999
- Bills became law
- 0
- 27 sponsored, 119th Congress
- Votes missed
- 0.4%
- Chamber median 2.1%
- With party
- 97%
- On votes splitting the parties
- Last margin
- −3.1
- Lost 2026
Source: Wikidata, congress-legislators and Open States; 99chambers legislative recordsUpdated Nov 7, 2026, 3:00 PM ET
Committees
119th Congress.
- House Committee on Ways and MeansTax · Ranking MemberHealth
Source: congress-legislators committeesUpdated Nov 7, 2026, 3:00 PM ET
Legislation
Source: Congress.gov billsUpdated Nov 6, 2026, 3:27 PM ET
Voting record
Where Thompson sits in the U.S. House
Thompson is closer to the center than 62% of the chamber's Democrats.
Closest: Andrea Salinas, Mike Quigley, Lois Frankel
Source: 99chambers roll-call scalingUpdated Nov 6, 2026, 5:06 PM ET
With Thompson’s party
- Votes with the chamber's Democrats97%
- Cosponsorships of the other party's bills27%
Black tick: the average of Democrats in the U.S. House.
Source: 99chambers legislative scores from roll calls and cosponsorships
Key votes
Votes chosen for their effect, not their side: Thompson’s vote, each party’s majority, and the result. An orange vote differs from most Democrats.
| Date | Bill | Thompson | Dem. majority | Rep. majority | Result |
|---|---|---|---|---|---|
| Sep 16, 2026 | HR 5334: Lindsey O. Graham Sanctioning Russia and Iran Act of 2026 | No | No | Yes | Passed 262–159 |
| Jun 30, 2026 | HCONRES 108: Directing the President pursuant to section 5(c) of the War Powers Resolution to… | Yes | Yes | No | Failed 189–235 |
| Jun 9, 2026 | S 2: Secure America Act | No | No | Yes | Passed 214–212 |
| May 13, 2026 | HR 1346: To amend the Clean Air Act with respect to the ethanol waiver for Reid Vapor Pressure… | Yes | No | Yes | Passed 218–203 |
| Feb 12, 2026 | HR 2189: To modernize Federal firearms laws to account for advancements in technology and… | No | No | Yes | Passed 233–185 |
Source: 99chambers key votes from Congress.gov, Voteview and Open States roll calls
Career
Offices held, and every time Thompson was on a ballot. Filled marks are general elections won; hollow marks are primaries; an orange outline is a loss.
Source: 99chambers results archive (MEDSL, Klarner, state election offices)
Elections
Margin against the seat’s presidential baseline: how the seat voted for president in the same or nearest year.
| Year | Race | Result | Margin | Seat | +/− |
|---|---|---|---|---|---|
| 2026 | California's 4th District | Lost | R+3.1 | D+15.0 | −18.1 |
| 2024 | U.S. House, CA-4 | Won | D+32.9 | — | — |
| 2022 | U.S. House, CA-4 | Won | D+35.6 | — | — |
| 2020 | U.S. House, CA-5 | Won | D+52.2 | — | — |
| 2018 | U.S. House, CA-5 | Won | D+57.7 | — | — |
| 2016 | U.S. House, CA-5 | Won | D+53.8 | — | — |
| 2014 | U.S. House, CA-5 | Won | D+51.5 | — | — |
| 2012 | U.S. House, CA-5 | Won | D+48.9 | — | — |
| 2010 | U.S. House, CA-1 | Won | D+31.8 | — | — |
| 2008 | U.S. House, CA-1 | Won | D+44.7 | — | — |
| 2006 | U.S. House, CA-1 | Won | D+37.2 | — | — |
| 2004 | U.S. House, CA-1 | Won | D+38.7 | — | — |
| 2002 | U.S. House, CA-1 | Won | D+31.7 | — | — |
| 2000 | U.S. House, CA-1 | Won | D+37.0 | — | — |
| 1998 | U.S. House, CA-1 | Won | D+29.0 | — | — |
| 1994 | California State Senate, District 2 | Won | D+25.0 | — | — |
| 1990 | California State Senate, District 4 | Won | D+1.0 | — | — |
| 1982 | California State Assembly, District 18 | Lost | R+37.3 | — | — |
Source: 99chambers results archive; 2026: California Secretary of State (unofficial)Updated Nov 8, 2026, 7:01 PM ET
Campaign money, 2025–26
- Raised
- $5.5M
- Spent
- $5.3M
- Cash
- $1.4M
Source: FEC filings through Oct 14, 2026Updated Nov 3, 2026, 2:14 AM ET
Campaign committees
Open committees can still raise and spend money.
| MIKE THOMPSON FOR CONGRESS FEC | Active |
Source: FEC filings through Oct 14, 2026Updated Nov 3, 2026, 2:14 AM ET
Seats Thompson has held
- U.S. House, CA-4 · 2023–2027
- U.S. House, CA-5 · 2013–2023
- U.S. House, CA-1 · 1999–2013
- California State Senate, District 2 · 1994–1998
- California State Senate, District 4 · 1990–1994
Source: 99chambers results archive
Who Thompson has run against
- Eric Jones (D) · 2026 general, lost
- John Munn (R) · 2024 election, won
- Matt Brock (R) · 2022 election, won
- Scott Giblin (R) · 2020 election, won
- Anthony Mills (I) · 2018 election, won
- Carlos Santamaria (R) · 2016 election, won
Source: 99chambers results archive; 2026: California Secretary of State (unofficial)
In the polls
Included in 1 poll; Thompson’s best result was 35% (California's 4th District).
Thompson’s polls in the database →How we know Thompson
One person, matched across every source we use.
- Bioguide T000460
- FEC H8CA01109
- Wikidata Q1323196
- Ballotpedia Mike Thompson (California)
- Vote Smart 3564
- GovTrack 400403
- OpenSecrets N00007419
Source: Identity links: Wikidata, congress-legislators, Open States, FECUpdated Nov 7, 2026, 3:00 PM ET