The Brief A special election for the Arizona Congressional District 7 seat is being held on Sept. 23. The seat was vacated following the death of U.S. Rep. Raúl Grijalva. Polls are open in Arizona as voters decide on who will replace the late Raúl Grijalva in Congressional District 7. What's next:On Sept. 23, a special election is being held to see who will succeed Grijalva. Democrat Adelita Grijalva, Raul's daughter, is facing off against Republican Daniel Butierez.