Arizona's 5th congressional district (AZ-05) is a U.S. House of Representatives seat that covers parts of the Phoenix metropolitan area, including eastern Maricopa County and the city of Chandler, as well as rural areas to the east such as Pinal and Gila counties. The district was created after the 2020 census and first contested in the 2022 midterm elections. It is currently represented by Republican Andy Biggs, who has held the seat since its creation. The 2026 midterm elections will determine who represents AZ-05 in the 119th Congress, with the general election scheduled for November 4, 2026. The district is considered a Republican-leaning seat, but its exact partisan lean has shifted over time. In the 2022 election, Biggs won with 56.6% of the vote against Democratic challenger Jevin Hodge, a margin of about 13 points. However, in 2024, Biggs faced a closer race, winning 54.4% against Democrat Katrina Schaffner, a margin of about 9 points. This tightening reflects broader demographic changes in the Phoenix suburbs, where growing Hispanic and college-educated populations have made some districts more competitive. Interest in the AZ-05 race stems from its potential to be a bellwether for national political trends. The district's mix of suburban, exurban, and rural voters makes it a microcosm of the broader political realignments in Arizona and the Sun Belt. Control of the U.S. House is often decided by a handful of competitive seats, and while AZ-05 is not currently among the most competitive nationally, shifts in voter registration and turnout could change that. The 2026 cycle will also be influenced by the presidential election year dynamics, as midterm elections typically see lower turnout and a possible backlash against the incumbent president's party. Key factors to watch include candidate recruitment, fundraising, and national political climate. Incumbent Andy Biggs, a conservative member of the House Freedom Caucus, has not yet announced whether he will seek reelection in 2026. If he retires, the open seat could attract a crowded primary field and potentially become more competitive in the general election. On the Democratic side, the party hopes to build on its 2024 performance and capitalize on issues like abortion rights and economic concerns. The outcome will depend on which party can better mobilize its base and attract swing voters in this evolving district.

Historical Context

Arizona's 5th congressional district was created after the 2020 census, when Arizona gained one additional House seat due to population growth, bringing its total to nine. The redistricting process was conducted by the Arizona Independent Redistricting Commission (AIRC), which was established by a 2000 voter initiative to reduce partisan gerrymandering. The commission drew AZ-05 as a Republican-leaning district that includes parts of eastern Maricopa County, including Chandler, and extends east into rural Pinal and Gila counties. The district replaced the previous AZ-05, which had been represented by Republican Andy Biggs since 2017 and was dismantled after the 2020 census. Prior to the current boundaries, Arizona's congressional districts have shifted significantly over the past two decades. The old AZ-05, which covered parts of the East Valley and rural areas, was a safe Republican seat. The new district is slightly less Republican, as the AIRC aimed to create a more competitive map overall. In the 2022 election, the first under the new lines, Biggs won 56.6% to 43.4% against Democrat Jevin Hodge. This was a closer margin than the old district's typical 60-40 split, indicating that the new boundaries made the seat more competitive. The 2024 election saw further tightening, with Biggs winning 54.4% to 45.6% against Democrat Katrina Schaffner. This shift aligns with broader trends in Arizona's suburbs, where Democratic performance has improved in recent cycles. For example, neighboring AZ-01 and AZ-06 have become more competitive, with Democrats winning AZ-01 in 2022 and 2024. The 2026 election will be the third contest under the current lines, and further demographic changes could continue to narrow the Republican advantage. Historically, midterm elections tend to favor the party not holding the presidency, which could benefit Democrats in 2026 if a Republican is in the White House.