Democrat JoAnna Mendoza has defeated Republican incumbent Juan Ciscomani in Arizona's 6th Congressional District, according to Decision Desk HQ projections, handing Democrats a critical pickup in their bid to regain control of the House.
With 70% of the vote counted, DDHQ called the race for Mendoza at 10:13 p.m. EST Tuesday, showing her ahead by 18.5 percentage points. The district, which includes parts of Tucson and surrounding areas, was one of the most competitive in the country and a top target for Democrats, who need a net gain of three seats to flip the lower chamber.
Ciscomani, first elected in 2022, narrowly won his previous race, but the district has trended Democratic in statewide elections. Mendoza, a 20-year veteran of the Navy and Marine Corps, ran a campaign sharply critical of Ciscomani's voting record, particularly his support for the GOP's signature One Big Beautiful Bill Act. She argued that the legislation, which cuts nearly $1 trillion from Medicaid and more than $180 billion from the Supplemental Nutrition Assistance Program, would drive up costs for working families in the district.
Her victory adds to a wave of Democratic successes in key House races across the country. In other contests, Democrats have flipped seats in Georgia, Kentucky, and Pennsylvania, while holding onto gubernatorial races in Wisconsin, Colorado, and Arizona. The party's path to a House majority now appears increasingly viable, with Mendoza's win providing fresh momentum.
Political analysts point to Mendoza's military background and her focus on economic issues as decisive factors in a district where voters have shown willingness to split tickets. Her campaign emphasized local concerns, such as healthcare affordability and food security, while tying Ciscomani to national GOP policies that polled poorly in the district.
Ciscomani's defeat marks a significant blow to Republicans, who had poured resources into defending his seat. The party now faces an uphill battle to maintain its narrow majority, with several other competitive races still undecided.
Mendoza's win is part of a broader trend of Democratic gains in the Southwest, where demographic shifts and voter mobilization have reshaped the political landscape. Her victory, alongside other flips, could prove pivotal in determining control of the House.
As results continue to come in, Democrats are optimistic about their chances, while Republicans are recalibrating their strategy for the next Congress. Mendoza is set to take office in January, ready to represent a district that has sent a clear message of change.
