U.S. House · CA-04
Rep. Mike Thompson (D)
Represents California’s 4th District, in office since Jan. 3, 2025. Official site (opens in a new tab)
$8.32spent by the campaign for every vote cast in the 2024 general election
- This race$8.32
- Opponent$0.47
- CA average$10.54
- House average$8.13
Ranks 126 of 422 House members (1 = most spent per vote).
The 2024 race
| Candidate | Votes | Campaign spent | Per vote cast |
|---|---|---|---|
| Mike Thompson (D), won | 227,730 (66.5%) | $2,852,645 (opens in a new tab) | $8.32 |
| John Munn (R) | 114,950 (33.5%) | $159,805 (opens in a new tab) | $0.47 |
Total votes cast: 342,680. “Per vote cast” is the campaign’s total spending for that election divided by all votes cast in the race.
Tracked issue money in 2026
| Issue | Groups | Given | Bundled | Spent for | Spent against |
|---|---|---|---|---|---|
| HousingReal estate and home building | Realtors PAC (RPAC), NAHB BUILD-PAC, NMHC PAC | $38,000 | $0 | $115,157 | $0 |
| Health care costsHospitals, doctors and drugmakers | AHA PAC, AMPAC, Pfizer PAC | $15,000 | $0 | $275,000 | $0 |
| AI & data centersAI and tech company PACs | Google NetPAC, Amazon PAC | $8,500 | $0 | $0 | $0 |
| GunsGun safety | Giffords PAC | $1,000 | $0 | $0 | $0 |
| Energy & climateOil and gas industry | Chevron PAC, Marathon Petroleum PAC, API PAC | $13,500 | $0 | $0 | $0 |
| Energy & climateEnvironmental groups | LCV Action Fund, Sierra Club Independent Action | $50 | $0 | $10 | $0 |
| IsraelGroups seeking policy changes | J Street PAC | $0 | $10,230 | $0 | $0 |
| EducationTeachers unions | NEA Fund, AFT COPE | $14,000 | $0 | $0 | $0 |
| DefenseDefense contractors | Lockheed Martin PAC, RTX PAC, Northrop Grumman PAC, Boeing PAC | $19,000 | $0 | $0 | $0 |
Results: MIT Election Data + Science Lab. Spending: FEC candidate totals for the 2024 election (as of Oct. 31, 2026). How this is calculated.