WASHINGTON (AP) — Voters in southern Arizona will send a new representative to Congress after Tuesday’s special election to replace the late Democratic U.S. Rep. Raúl Grijalva, who died in March of complications from cancer treatment.

The winner will serve out the remaining 15 months of Grijalva’s term in the 7th Congressional District, which stretches from Yuma to Tuscon and hugs almost the entire length of Arizona’s border with Mexico.

The seat will not decide control of the U.S. House, but it is one of two remaining vacancies in heavily Democratic districts that could chip away at Republicans’ slender 219-213 majority in the chamber. A third vacancy in a heavily Republican Tennessee district won’t be filled until December.

The major contenders to replace Grijalva are former Democrati

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