Kirkpatrick is also a moderate, and won in a much more conservative district than Sinema.
Correct. Kirkpatrick (who is neither bisexual not atheist, By the way) has also been in the house for longer. In 2008, despite Arizonan and former AZ-01 Congressman John McCain being the Republican nominee, and winning the district handily, Kirkpatrick managed to oust the district's Republican incumbent, so she has been able to attract crossover voters. She did lose in 2010, due to the wave and a strong Republican recruit, Paul Gosar. But in 2012, after the redistricting drew Gosar's home base into another district, Kirkpatrick won back her old seat, even as Romney won the district, while Gosar was elected to represent his new district, the fourth. Sinema, meanwhile, was elected in a district that Obama won. In 2014, Kirkpatrick was again reelected, despite another wave, and she seems to be popular. If she can't win in 2016, with all the anti-Trump sentiment among Latinos, a presidential year bringing higher turnout (favoring Democrats), a contested GOP primary, and Kirkpatrick being the strongest democrat (IMO) for Arizona, and she still loses, then Arizona truly is fool's gold for the Democrats. Ducey and Flake would be favored in 2018 unless it somehow becomes a wave for the Democrats. While we're at it, have there been any polls for this race lately? (GOP primary and GE)