U.S. House · Arizona's 5th District

East Valley suburbs of Phoenix, including parts of Mesa, Gilbert, Queen Creek, San Tan Valley, and Apache Junction.

General election · Tuesday, November 3, 2026

Sources re-checked September 25, 2026 · How we research

• This is an open seat. Incumbent Republican Andy Biggs, who had held the seat since 2017, did not seek re-election and instead ran for governor of Arizona. Elizabeth Lee won the July 21, 2026 Democratic primary with 64.5% of the vote over Chris James and Brian Hualde. Mark Lamb, the former Pinal County Sheriff (2017-2024) and 2024 U.S. Senate candidate, won the Republican primary with 58.6% over self-funded businessman Daniel Keenan, defeating candidates including state legislators Travis Grantham and Mike Gross for the nomination; Andy Biggs also withdrew from this primary. Lamb's primary win came amid public allegations from multiple women, reported by the Arizona Republic and independently verified by KTAR News, that he had sent them sexually charged messages and, in one case, threatened her with felony revenge-porn charges; Lamb largely declined to comment on the allegations, and in June 2026 a Pinal County Attorney's Office review concluded it found 'no evidence that Lamb acted in a criminal manner.' Cook Political Report rated the district R+10.[1][3][5][6]