TUCSON, Ariz. — Voters in southern Arizona are headed to the polls to vote in the special election for Arizona's 7th Congressional District.

The winner of Tuesday's special election will fill the seat left open after the death of Democratic U.S. Rep. Raúl Grijalva, who died in March of complications from cancer treatment.

The candidates vying to replace Grijalva are former Democratic Pima County Supervisor Adelita Grijalva, daughter of the late congressman, and Republican nominee Daniel Butierez, a contractor and small business owner. Two third-party candidates are also on the ballot.

Whoever wins on Tuesday will serve out the remaining 15 months of Raúl Grijalva's term for the 7th Congressional District, which stretches from Yuma to Tucson, including almost the entire length of Arizo

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