Ken Calvert Defeats Young Kim for California's 40th District

Republican Ken Calvert won reelection to California's 40th Congressional District on November 10, 2026, defeating fellow Republican incumbent Young Kim. Official results from the Secretary of State of California showed Calvert winning with 53.6% of the vote, or 98,455 votes, compared to 46.4% and 85,145 votes for Kim.

The contest was a rare general election matchup between two incumbents of the same party. This head-to-head fight resulted from Proposition 50, a 2025 ballot measure that redrew congressional boundaries and merged Calvert's former 41st District with Kim's 40th District. The new district encompasses portions of Orange, Riverside, and San Bernardino counties.

The campaign was a bitter intraparty struggle where both candidates questioned each other's loyalty to Donald Trump. Calvert, the longest-serving Republican in California's House delegation, highlighted Kim's 2021 vote against a Trump-era methane emissions rule to challenge her conservative credentials.

Young Kim conceded the race on Monday evening via a post on X. She characterized the redistricting process as a "political redistricting scheme" by Governor Gavin Newsom that forced two Republican members of Congress into a single race.