Five districts set to decide control of the Arizona Legislature

Arizona’s November map for control of the Legislature is coming into focus. With most primaries functionally settled and only the official canvass left on August 6, a small handful of general election contests now look like the ones that will decide whether Republicans keep narrow majorities in both chambers or whether Democrats force a change at the Capitol.

Republicans enter the fall with a 17 to 13 edge in the Senate and a 33 to 27 edge in the House. Those numbers matter. A Democratic Senate majority would require a net gain of three seats. In the House, Democrats need a net gain of four. Most districts are so lopsided that the primary determines the winner, which is why the short list of true swing races is where both parties will concentrate money and message.

According to an Arizona Capitol Times review of the post-primary field and unofficial returns posted by the Secretary of State, five contests are poised to do the most work in November: the Senate race in Legislative District 2, the Senate and House races in LD4, the open-seat House battle in LD13, and the two-seat House race in LD17.

LD2 Senate remains one of the most competitive districts in the state. Incumbent Sen. Shawnna Bolick, a Phoenix Republican who, per the Capitol Times, had the most bills signed in the 2025 session, led her primary over Timothy Ferrara 71 percent to 29 percent in Thursday’s unofficial tally from the Secretary of State. Ferrara, an IT specialist and state Republican committeeman running with Clean Elections funding, argued Bolick is out of touch. On the Democratic side, physician and researcher Amelia Gallitano led veteran Daniel Toporek 77 percent to 23 percent. Republicans hold 45,751 registered voters in LD2 to Democrats’ 34,760, with 47,197 voters unaffiliated, according to the latest Secretary of State records cited in the report.

The registration math in LD2 explains why both parties treat it like a coin flip despite a GOP edge on paper. Unaffiliated voters outnumber either party, Clean Elections money levels some of the resource imbalance, and Bolick’s legislative productivity will be cast either as effectiveness or as the wrong priorities, depending on who is doing the casting. Expect this one to hinge on who defines the middle.

In LD4’s Senate race, no primaries means a straight November matchup between Republican Sen. Carine Werner of Scottsdale and former Democratic Rep. Aaron Lieberman. Werner unseated Democratic Sen. Christine Marsh by just under 4 points in 2024. Lieberman previously won two House terms before resigning in 2021 to run for governor and now runs a business focused on EV charging for apartments. Republicans lead registration in the north Scottsdale, Paradise Valley, and north Phoenix district 66,152 to 43,945, with 55,812 unaffiliated, per the Secretary of State figures referenced by the Capitol Times.

LD4’s two House seats are also in play. Incumbent Republicans Matt Gress and Pamela Carter led their primary with 45 percent and 34 percent, respectively, ahead of Sandra Christensen at 21 percent in Thursday’s unofficial count. Democrats Karen Gresham and Tammy Caputi are unopposed and advance to November. Gresham fell short by about 2 points against Carter in 2024. The dynamic is familiar: two seats on the ballot, split-ticket outcomes are common in competitive suburbs, and marginal changes in turnout can swing which party claims the second seat.

LD13’s House race is wide open with no incumbent on the ballot. House Majority Whip Julie Willoughby is seeking the district’s Senate seat, and Republicans swept all three LD13 legislative seats last cycle. As of Thursday’s unofficial results, Chandler Mayor Kevin Hartke and Janet Weninger led the GOP primary at 43 percent and 35 percent, with Debra Schinke at 22 percent. Democrats Rockee Armstrong and Jacob Weinberg had no primary opposition and move on to the general. The Arizona Independent Redistricting Commission rates LD13 highly competitive, and the registration table is a three-way: roughly 51,000 Republicans, 38,000 Democrats, and 52,000 unaffiliated voters, per the Secretary of State data cited.

LD17’s House district was not drawn to be competitive, but it has behaved that way. Democrat Kevin Volk won a surprise single-shot victory in 2024 over former GOP Rep. Cory McGarr, and Republican Sen. Vince Leach beat Democrat John McLean by 2 points in the last Senate race. This year, Democrats Volk and Holly Lyon face Republicans Rachel Keshel and John Winchester. No primaries were contested, so all four advance. Registration tilts right, with nearly 70,000 Republicans, almost 52,000 Democrats, and about 61,000 unaffiliated voters across Pima and Pinal counties, according to the Secretary of State figures relayed in the Capitol Times report.

The consequence is straightforward. If Democrats net three Senate seats and four House seats from this small set of battlegrounds and a few second-tier races, they will control the agenda at the Capitol in 2027. If Republicans hold the line in places like LD2, LD4, LD13, and LD17, they will retain it. Registration advantages are only a starting point. Unaffiliated voters are the largest bloc in multiple swing districts, primaries are still unofficial until the Aug. 6 canvass, and candidate performance will outrun slogans. Over the next 100 days, watch for who shows their work: clear, testable plans that can win the middle, not just applause at a rally.

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