Incumbent
Mike Thompson
Incumbent Democratic candidate for U.S. House in California
$32.0K
NOV 7, 2026
General Election
Voters choose the office holder.
Live Odds
Current prediction-market probability for the candidate, updated as market prices change.
Mike Thompson is trading at 70% to win the CA-04 House winner? on prediction markets.
Candidate Overview
Key details about the candidate’s background, party, office sought and current campaign.
Current roleU.S. Representative
PartyDemocratic
Political ideologyConservative Democrat
Age75 years old (Jan 24, 1951)
GenderMale
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LocationCalifornia
BackgroundPolitician
EducationNapa Valley College (attended)
Notable personal detailsCharles Michael “Mike” Thompson is a Democratic member of the U.S. House of Representatives, serving Northern California in California’s 4th Congressional District since 1999 after service in the California State Senate. He is a Vietnam War veteran who served in the U.S. Army with the 173rd Airborne Brigade and received a Purple Heart. He has worked as a vineyard owner and winery maintenance supervisor and has taught public administration and state government at California State University, Chico and San Francisco State University.
SourcesShowHide
Political Positions
Economy & Taxes
Supports tax policies that reduce burdens on low- and middle-income families, use the tax code to advance climate and housing goals, and ensure wealthy individuals and corporations pay a fair share; favors targeted tax relief for families while opposing large tax cuts that primarily benefit the wealthy.
Healthcare
Supports the Affordable Care Act and efforts to lower health insurance costs, including extending enhanced ACA premium tax credits and opposing Republican proposals that would cut Medicaid or remove coverage. Advocates expanding access to care through policies such as telehealth expansion and holding insurers accountable for pre-existing conditions protections.
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Immigration & Border
Supports comprehensive immigration reform that secures the border while creating earned pathways to lawful status and protections for Dreamers; emphasizes humane processing of asylum seekers and services for immigrant communities while also recognizing the need to address illicit activity at the border. Has backed measures to expand pathways to citizenship for specific groups (e.g., veterans and DREAMERS) and has criticized ICE practices and voted against ICE/Border Patrol funding in at least one recent action.
Abortion & Reproductive Rights
Supports protecting and ensuring access to abortion and reproductive healthcare, has backed federal legislation to protect abortion access and introduced legislation to protect contraception access, and opposed the Supreme Court decision overturning Roe v. Wade.
Climate & Energy
Supports strong federal investments and incentives for clean energy, authored the GREEN Act to expand renewable energy tax credits, and voted for the Inflation Reduction Act to fund climate action and emissions reductions. Also works on resilience and affordability measures related to climate impacts and energy bills.
Public Safety & Guns
Supports expanded/universal background checks and other gun-violence prevention measures while stating support for Second Amendment rights and lawful gun ownership. Leads the House Gun Violence Prevention Task Force and has introduced/reintroduced bipartisan background-check legislation. Emphasizes improving background-check systems and targeted restrictions to keep guns from dangerous individuals.
Latest News
Mike Thompson is in the news because he advanced from California’s 4th Congressional District primary and is now headed to the general election. He is seeking reelection in the redrawn district, where he faces challenger Eric Jones after a competitive primary. Jones has also challenged Thompson to multiple debates, and the race is drawing attention because redistricting has made much of the district new and the campaign has featured heavy spending and attacks over corruption and campaign finance.
California election results for governor, LA mayor, House primaries
Eric Jones trails in early 4th District ballot returns
Rep. Mike Thompson is making his case for a 15th term in Congress. Here's what that looks like in California's 4th District
Sonoma Valley Democrats to host Feb. 9 forum for Thompson, primary challengers
Campaign Fundraising
Latest report: Cycle 2026Campaign finance totals from the latest available reporting period.
2022
2024
2026
LatestCycle 2022
Cycle 2024
Cycle 2026
Source: FEC
New updates coming soon
We're monitoring and will update when new data impacts the race.
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