Arizona State Senate District 13

Current seat holder: J.D. Mesnard.

Julie Willoughby

Julie Willoughby graduated from Fountain Hills High School. Willoughby earned a B.S. in registered nursing from Arizona State University at Tempe in 2012.

· Official legislative page · Ballotpedia

Priorities & Governance: “As a proud ASU graduate and long-time Arizonan, I’ve built my life here with my husband and children, and what happens in our state matters deeply to me.” (AZ Clean Elections 2026 Voter Education Guide)
Education: “As Majority Whip in the Arizona House, I’ve delivered real results: historic tax relief for working families, including more than $1.4 billion in savings and a stronger Child Tax Credit, strengthening public safety, and making smart investments in education and health care.” (AZ Clean Elections 2026 Voter Education Guide)
Healthcare: “I’ve led efforts to protect children and families by passing laws to combat fentanyl trafficking, crack down on online exploitation, expand maternal mental health support, and protect children from harmful content online.” (AZ Clean Elections 2026 Voter Education Guide)

Kristie O'Brien

Kristie O'Brien is a Democratic candidate for Arizona State Senate District 13 in the November 3, 2026 general election.

· Arizona Secretary of State

Campaign site

Campaign priorities: “I’m a mother, an East valley native who grew up in Chandler, lawyer turned mediator, and now I’m running to represent Legislative District 13 in the Arizona State Senate.” (Campaign website (accessed Oct 23, 2026))
Families & communities: “I’m running for the Arizona State Senate because our community deserves leadership focused less on division and more on results. I’m ready to bring that approach to the State Capitol and deliver common-sense solutions that make life better for Arizona families.” (Campaign website (accessed Oct 23, 2026))