Skip to Main Content

Fundraising in California's 4th Congressional District

Incumbent Mike Thompson is up for election in California's 4th Congressional District in 2026. This race is rated as Solid D. We estimate that $2.97M has been spent on this race over the last two years. Democrats have outspent Republicans by $2.93M over that time period, per our estimates.

Cumulative Spending by Party

Note: Recent data is often incomplete due to lags between spending and disclosure