Race2026 cycle · RunoffsElection day 3 Nov 2026Updated

Cite this page

DonorAlpha, “California 40th District general 2026”, https://donoralpha.com/races/california-40th-district-general-2026?e=c2026&el=runoff, updated .

California 40th District general 2026

No. 90 of 527 House races in the 2026 cycle

This race is in the 2026 general election.

The short version

In the 2026 California 40th District general election, 5 outside groups spent $2.8M: $644K supporting Young Kim (R), $1.7M opposing Young Kim, $360K supporting Ken Calvert (R) and $72,092 opposing Ken Calvert.

$2.8M

outside money

supporting Young Kim (R)
$644K
opposing Young Kim (R)
$1.7M
supporting Ken Calvert (R)
$360K
opposing Ken Calvert (R)
$72,092

Result not in yet

Election day is 3 Nov 2026.

  • Young Kim

    Republican

    Waiting for the count

  • Ken Calvert

    Republican

    Waiting for the count

Outside money supporting and opposing each candidate

Both sides on one scale
← OpposingSupporting →
  • Young Kim Republican

    $1.7M
    $644K

    $644K supporting Young Kim · $1.7M opposing Young Kim

  • Ken Calvert Republican

    $72,092
    $360K

    $360K supporting Ken Calvert · $72,092 opposing Ken Calvert

The long version

The candidates

What each candidate’s own campaign raised, beside what outside groups spent supporting and opposing them.

  • Young Kim

    Republican

    Own campaign raised
    $8.8M
    Outside money supporting
    $644K
    Outside money opposing
    $1.7M
    Young Kim for Congress
  • Ken Calvert

    Republican

    Own campaign raised
    $6.1M
    Outside money supporting
    $360K
    Outside money opposing
    $72,092
    Ken Calvert for Congress Committee
  • Campaign money to 30 Jun 2026

Week by week

Outside money each week, supporting and opposing the candidates, all candidates combined.

Week of 28 Sep 2026

Supporting $146KOpposing $106K

Supporting candidatesOpposing candidates

The groups on each side

The biggest outside groups in this race, by what they spent supporting or opposing each candidate.

Spent supporting a candidate

  1. America's Credit Unions PACsupporting Young Kim$498K
  2. Americans 4 Security PACsupporting Ken Calvert$360K
  3. CFFsupporting Young Kim$70,063

Spent opposing a candidate

  1. Americans 4 Security PACopposing Young Kim$1.7M
  2. CFFopposing Ken Calvert$68,576
  3. Activate Americaopposing Ken Calvert$3,516
  4. Activate Americaopposing Young Kim$1,732

Who’s connected to whom

The groups that spent supporting or opposing the candidates.

Their biggest giversGroups that spentCandidatesAmericans 4 Security PAC spent $1.7M opposing Young Kim · $1.7MAmerica's Credit Unions PAC spent $498K supporting Young Kim · $498KAmericans 4 Security PAC spent $360K supporting Ken Calvert · $360KNational Association of Realtors Political Action Committee spent $75,717 supporting Young Kim · $75,717CFF spent $70,063 supporting Young Kim · $70,063CFF spent $68,576 opposing Ken Calvert · $68,576Activate America spent $3,516 opposing Ken Calvert · $3,516Activate America spent $1,732 opposing Young Kim · $1,732Americans 4 Security gave $2.5M to Americans 4 Security PAC · $2.5MHermeus Corp gave $100K to Americans 4 Security PAC · $100KGolden State Rebellion (CA) gave $350K to CFF · $350KTurbo Air gave $20,000 to CFF · $20,000Vote Rev Action Fund gave $11,875 to Activate America · $11,875We Build Progress gave $2,750 to Activate America · $2,750Americans 4 SecurityAmericans 4 SecurityCompany or group · $2.5MHermeus CorpHermeus CorpCompany or group · $100KGolden State Rebellion (CA)Golden State Rebellion (CA)Company or group · $350KTurbo AirTurbo AirCompany or group · $20,000Vote Rev Action FundVote Rev Action FundCompany or group · $11,875We Build ProgressWe Build ProgressCompany or group · $2,750Americans 4 Security PACAmericans 4 Security PACGroup · $2.0MAmerica's Credit Unions PACAmerica's Credit Unions PACGroup · $498KCFFCFFGroup · $139KNational Association ofRealtors Political ActionCommitteeNational Association of Realtors Political Action CommitteeGroup · $75,717Activate AmericaActivate AmericaGroup · $5,248Young KimYoung KimCandidate · $2.3MKen CalvertKen CalvertCandidate · $432K
  • Americans 4 Security PAC spent opposing Young Kim · $1.7M
  • America's Credit Unions PAC spent supporting Young Kim · $498K
  • Americans 4 Security PAC spent supporting Ken Calvert · $360K
  • National Association of Realtors Political Action Committee spent supporting Young Kim · $75,717
  • CFF spent supporting Young Kim · $70,063
  • CFF spent opposing Ken Calvert · $68,576
  • Activate America spent opposing Ken Calvert · $3,516
  • Activate America spent opposing Young Kim · $1,732
  • Americans 4 Security gave to Americans 4 Security PAC · $2.5M
  • Hermeus Corp gave to Americans 4 Security PAC · $100K
  • Golden State Rebellion (CA) gave to CFF · $350K
  • Turbo Air gave to CFF · $20,000
  • Vote Rev Action Fund gave to Activate America · $11,875
  • We Build Progress gave to Activate America · $2,750
GaveSpent supportingSpent opposingSwipe to see the whole map.

Group

Americans 4 Security PAC

  • Americans 4 Security PAC spent $1.7M opposing Young Kim$1.7M
  • Americans 4 Security PAC spent $360K supporting Ken Calvert$360K
  • Americans 4 Security gave $2.5M to Americans 4 Security PAC$2.5M
  • Hermeus Corp gave $100K to Americans 4 Security PAC$100K

Polls

Every poll of this race on one timeline.

The average of 2 polls to 9 Sep 2026 has Young Kim at 37.5% and Ken Calvert at 33.5%.

2polls in the average

polls of this race
2
pollsters
2

Young KimKen Calvert

Grassroots Targetinga party-aligned sponsor paid for it5 Sep to 9 Sep 2026 · 800 likely voters
RepublicanYoung Kim43.0%
RepublicanKen Calvert34.0%

Point at a dot, or tab in and use the arrow keys

Every poll, newest first

  1. 9 Sep ’26Grassroots Targeting a party-aligned sponsor paid for it5 Sep to 9 Sep 2026 · 800 likely votersYoung Kim 43.0%Ken Calvert 34.0%
  2. 12 Jul ’26American Viewpoint a party-aligned sponsor paid for it8 Jul to 12 Jul 2026 · 400 likely votersYoung Kim 32.0%Ken Calvert 33.0%
For reporters, researchers and the professionally curious

Go deeper

The paperwork behind this race, all of it. Free with an email sign-in.

The paperwork

Sign in free with your email

It’s free. We only want your email address. We’ll never ask you to chip in $5.