Mike Thompson
Democrat · CA-4 · U.S. House
CA-4 — U.S. House
Safe D 99%Mike Thompson is not among the listed candidates for this seat — the seat is still up in 2026, as every House seat is. Nominees are not yet set. Runs on a newly enacted district map.
Bio
Charles Michael Thompson is an American politician serving as the U.S. representative for California's 4th congressional district since 1999. The district, in the outer northern portion of the San Francisco Bay Area, includes all of Lake and Napa counties and parts of Contra Costa, Solano, Yolo and Sonoma counties. Thompson chairs the House Gun Violence Prevention Task Force. He is a member of the Democratic Party.
Full bio on Wikipedia →Record of service
- In office
- 27.7 years
- First took office
- 1999 (14 terms)
- Seniority
- 31 of 439 by time served
- Age
- 75
- Napa, CA · 707-226-9898
- Santa Rosa, CA · 707-542-7182
- Woodland, CA · 530-753-5301
Service history, offices and identifiers from unitedstates/congress-legislators (public domain). Years served sum each term rather than subtracting the first start date, so a break in service is not counted as time in office.
Overall lean (DW-NOMINATE)
Issue profile
Each issue runs left ↔ right, scored from how the member voted on bills tagged to that issue (−1…+1). Issues with too few votes are blank. Overall lean uses DW-NOMINATE.
How they score against the parties
Mike Thompson's voting record compared with each party's national platform, issue by issue — the same similarity score used across the site.
On the political map
Mike Thompson (the large ringed dot) among every current member of Congress and the party platforms.
Each small dot is a current member (Dem · Rep); the larger dots are party platforms — click one for its closest members. Economic axis: taxes, healthcare, labor, energy. Social axis: abortion, guns, immigration, civil rights, crime.
Do you vote like Thompson?
Answer a few questions on the issues and see which members of Congress — and which party — actually line up with you.
Caucuses & committees
Where Thompsonsits in Congress's own organization — each group's lean is computed from its members' voting records. Explore them all on the caucuses and committees pages.
Caucuses
- Blue Dog Coalitionleft · 10 members
Committees
- House Committee on Ways and Meanscenter · 45 members
Most and least aligned members
Treating Thompson's 14 issue scores as a vector, cosine similarity measures whether two voting records point the same way (+100%) or in opposite directions (−100%) — the colleagues whose records align most and least with theirs.
Recent notable votes
Latest news
House Progressive Chair Says 'Every Single Cent' of Trump Tariff Refunds Should Go to ConsumersCongressional Progressive Caucus Chair Greg Casar (D-Texas) said on Monday that "every single cent" of the refunds for President Donald Trump's illegal tariffs should go to consumers who bore the brunt of the financial strain rather than the large corporation…
Common Dreams · August 3, 2026
100% Tax Proposed to Counter 'Most Corrupt Thing… Ever Seen From an American President'President Donald Trump's attempt to create a $1.8 billion slush fund for his political allies is coming under bipartisan attack, and congressional Democrats are proposing a 100% tax on any of its future beneficiaries to thwart what's being described as an unp…
Common Dreams · May 21, 2026
Swalwell's Gubernatorial Campaign Implodes Amid Bombshell Sexual Assault AllegationCalls for Democratic Congressman Eric Swalwell to drop out of the California gubernatorial race mounted Saturday as prominent supporters rescinded their endorsements and staffers fled his imploding campaign after more—and more serious—sexual misconduct allega…
Common Dreams · April 11, 2026
Dem rep identifies himself as one of this year's State of the Union designated survivors (Rachel Wolf/Fox News)Rachel Wolf / Fox News: Dem rep identifies himself as one of this year's State of the Union designated survivors — California Democrat selected as designated survivor will watch State of the Union from secure location — Rep. Mike Thompson, D-Calif., has i…
Memeorandum.com · February 24, 2026
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