Arizona State Senate: While Republicans held a solid majority at 21-9, there were five incumbent Republicans retiring, compared to three Democrats. With eight of thirty seats open, it was conceivable that Democrats could have taken majority control in the chamber.
In the wake of the primary, it was noted that the Tea Party fervor which erupted in 2010 had subsided somewhat, and the State Senate may have been headed for a more centrist path after the November elections.
Arizona House of Representatives: Heading into the election, Republicans held 40 of 60 seats in the House. In 2012, 14 Republicans retired and eight Democrats retired (one Independent retired as well).
- In the Republican primary for District 13, incumbents John Nelson and Don Shooter were projected to face-off, but Nelson withdrew just before the primary, leaving Shooter unopposed.
- District 16: Incumbent Rich Crandall (R) was opposed by current House member John Fillmore. The race was so close that as of August 29, the race had yet to be called. Eventually, Crandall was named the winner. He was seen as a more moderate Republican when compared to the Tea Party-backed Fillmore. Over $80,000 was poured into the races by Republicans in favor of Crandall.
- The Republican primary in District 1 was particularly unique, given that all three candidates were current members of the state legislature. Incumbents Karen Fann and Andy Tobin were members of the House, while Lori Klein represented Senate District 6 since 2011. No Democrats filed to run in this district, so the two winners of the Republican primary, Fann and Tobin, went into the general election unopposed.
- District 20: This seat was left open by retiring Republican John McComish. House Representative Kimberly Yee (R), Democratic challenger Michael Powell, and well known Independent Doug Quelland were all thought to have a legitimate chance at winning. Quelland was formerly a Republican member of the House and competed with Yee for the conservative vote, which was thought to possibly leave an opening for Powell. In the end, Yee came out as the winner.
- District 18: Democrats had hoped that Iraq war veteran Corey Harris would pose a challenge for Republican incumbents Jeff Dial and Bob Robson in this important swing district. However, Dial and Robson were re-elected comfortably.
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