WASHINGTON - Eight candidates are set to compete in special congressional primaries in Arizona's 7th District on Tuesday, July 16, 2025, to replace the late Democratic U.S. Rep. Raúl Grijalva, who passed away in March due to complications from cancer treatment [1][2][3].

The primaries will determine the candidates for a special election scheduled for September 23, 2025, to complete the remaining 15 months of Grijalva's term. The district, which stretches from Yuma to Tucson and covers most of Arizona's border with Mexico, has been a Democratic stronghold [1][2][3].

Five Democrats and three Republicans are vying for their respective party nominations. Among the Democratic candidates, Adelita Grijalva, daughter of the late congressman and former Pima County Supervisor, has garnered significant support from prominent Democrats, including U.S. Senators [1][2][3].

While this seat will not determine control of the U.S. House, it is one of three vacancies in heavily Democratic districts that could impact the Republicans' slim 220-212 majority when filled in special elections this fall [1][2][3].

The special election, set for September 23, leaves 70 days for the chosen candidates to campaign for the general election. The outcome of this race could have implications for the political landscape in Arizona and potentially influence the balance of power in the House [1][2][3].

As voters in southern Arizona prepare to cast their ballots, the primaries mark an important step in determining who will represent this diverse border district for the remainder of Grijalva's term [1][2][3].