Garcia, Kim, and Steel all represent districts that Joe Biden won in the 2020 presidential election, while Calvert's district narrowly voted for Donald Trump.

The 13th, 22nd and 40th districts flipped to Trump in the 2024 presidential election, with Duarte losing to Adam Gray in a split ticket vote.

[8][user-generated source] Several California Republicans received assistance from Protect the House 2024, a joint fundraising committee launched by former U.S. Speaker of the House and California Republican Kevin McCarthy to support vulnerable House Republicans.

Among the representatives included in the committee were Duarte, Valadao, Garcia, Calvert, and Steel, as well as Kevin Kiley of the 3rd district.

[11] Later that year, Pelosi announced she would step down from House leadership.

[1] John Duarte Republican Adam Gray Democratic The incumbent was Republican John Duarte, who flipped the district and was elected with 50.2% of the vote in 2022.

[11] This was a rematch between the candidates from 2022 where Duarte previously defeated Gray by a slim margin.

[180] This was the closest House race in 2024 and one of the last to be called due to the close margin, California's state law allowing ballots to arrive a week after the election, and a high quantity of absentee votes which must be cured.

[181] Ceres Courier erroneously declared Duarte the winner on November 13th claiming high confidence that the remaining vote total wouldn't allow Gray to overtake Duarte's lead of roughly 3,000 votes.

[182] Most networks declared Gray the winner in early December.

[183] Republican Donald Trump carried the district by 5.4% in the concurrent presidential election.

[6] Former San Jose mayor Sam Liccardo advanced to the general election a week after the primary.

[204] By April 3, Low and Santa Clara County supervisor Joe Simitian were tied with 30,249 votes each, and were expected to advance to the general election under a stipulation by California elections code regarding a second-place tie in primary elections.

The recount request was controversial, with Low's campaign accusing Liccardo of being behind it.

[11] McCarthy resigned on December 31, 2023, after his removal as Speaker of the House.

[240] A special election was held in May 2024 to fill McCarthy's vacant seat, which was won by Vince Fong, a state assemblyman who had formerly served as McCarthy's district director.

[11] Mike Garcia Republican George Whitesides Democratic The incumbent was Republican Mike Garcia, who was re-elected with 53.2% of the vote in 2022.

[11] She opted against seeking re-election, instead choosing to run for the U.S. Senate, ultimately losing her bid.