Representative Ken Calvert, a Republican who has served more than three decades in the House, is in a rematch with Democrat Will Rollins, who came close to beating him in 2022 in the Palm Springs-based district. Mr. Rollins is casting himself as a fresh face who is willing to work across the aisle.

Republican Rep. David Valadao is again facing Democrat Rudy Salas in 2024’s race in California’s 22 nd Congressional District, expected to be among the state’s tightest House races.

Republican incumbent John Duarte and Democratic challenger Adam Gray are competing for the office of Congressional District 13 in the 2024 California General Election on Nov. 5. This is their second time challenging each other in a race that was decided by less than half a percentage point in 2022.

Republican Rep. John Duarte and Democratic challenger Adam Gray are battling for California's 13th Congressional District in one of a handful of competitive races in the state that could help decide control of the U.