Results of the 2016 United States House of Representatives elections in Arizona by district: O'Halleran:      40–50%      50–60%      60–70%      70–80% Ann Kirkpatrick Democratic Tom O'Halleran Democratic Incumbent Democrat Ann Kirkpatrick, who had represented the district since 2013, and previously between 2009 and 2011, ran for the U.S. Senate seat held by John McCain.

Representatives Statewide officials Labor unions Individuals On the Republican side, rancher and candidate for the seat in 2014 Gary Kiehne ran again.

[13] Pinal County Sheriff Paul Babeu also ran in the primary.

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She defeated Democratic incumbent Ron Barber in 2014 with 50% of the vote State Representative Bruce Wheeler had formed an exploratory committee to run for the Democratic nomination, but decided not to run after having surgery to repair a torn retina.

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Grijalva faced only Libertarian write-in candidate Mike Ross in the general election.