Top-two primary
All candidates run in one primary regardless of party and the two with the most votes advance, so two candidates of the same party can meet in November. The forecast then marks the seat as safe for that party.
California › U.S. House of Representatives · November 3, 2026 · Updated Oct 16, 2026
California's 40th District
R vs RTop twoSame-party general election. Two Republicans advanced to November: the seat stays Republican.
Young Kim has no major-party opponent.
Young Kim has no major-party opponent.
How this race is decided
The candidates
RepublicanIncumbent
Young Kim
Incumbent U.S. representative
- Experience
- Statewide office or Congress
- Raised
- $8.8M
- From individuals
- $5.5M
- Spent
- $8.9M
- Cash on hand
- $1.7M
Money: FEC, through Jun 30, 2026.
RepublicanIncumbent
Ken Calvert
Incumbent U.S. representative (previously ran in the 41st district)
- Experience
- Statewide office or Congress
- Raised
- $6.8M
- From individuals
- $2.9M
- Spent
- $5.5M
- Cash on hand
- $1.6M
Money: FEC, through Sep 30, 2026.
The district
Lean R+11: how much more Democratic or Republican than the nation it votes for president.
Presidential vote
Precinct results re-aggregated to the current district lines.
Who lives here
- Population
- 797,997
- People per km²
- 409
- Adults with a B.A.+
- 38%
- White, no degree
- 29%of adults
- White 45%
- Hispanic 34%
- Black 4%
- Asian 11%
- Other / multiracial 7%
American Community Survey 2020–2024, aggregated from census tracts.
Past results
Results in the same-numbered district; earlier elections may have used different lines.
2024 Earlier district lines
383,288 votes · R+10.5✓ Young Kim (R)55.2%
Joe Kerr (D)44.8%
2024 President Vote in this district
371,375 two-party votes · R+12.6 · R+11.1 vs. the nation✓ Donald Trump (R)56.3%
Kamala Harris (D)43.7%
2022 Earlier district lines
284,311 votes · R+13.7✓ Young Kim (R)56.8%
Asif Mahmood (D)43.2%
2020 Earlier district lines
186,381 votes · D+45.5✓ Lucille Roybal-Allard (D)72.7%
C Antonio Delgado (R)27.3%
2020 President Vote in this district
391,756 two-party votes · R+7.7 · R+12.3 vs. the nation✓ Donald Trump (R)53.9%
Joe Biden (D)46.1%
2018 Earlier district lines
121,449 votes · Uncontested by the other party✓ Lucille Roybal-Allard (D)77.3%
Rodolfo Cortes Barragan (G)22.7%
2016 Earlier district lines
149,297 votes · Uncontested by the other party✓ Lucille Roybal-Allard (D)71.4%
Roman Gabriel Gonzalez (I)28.6%
2016 President Vote in this district
287,057 two-party votes · R+14.3 · R+16.5 vs. the nation✓ Donald Trump (R)57.2%
Hillary Clinton (D)42.8%
Also on the ballot in California
Neighboring districts
CA-35Norma TorresMike Cargile99%Dem.96%Dem. CA-38Hilda SolisPedro Casas>99%Dem.99%Dem. CA-39Mark TakanoSteve Manos>99%Dem.97%Dem. CA-46Lou CorreaDavid Pan>99%Dem.99%Dem. CA-47Dave MinJenny Le Roux99%Dem.97%Dem. CA-48Marni von WilpertJim DesmondD flipD flip92%Dem.89%Dem. CA-49Mike LevinArmen Kurdian>99%Dem.98%Dem.