Arizona State Representative, District 18
July 21, 2026 · State House District 18; Arizona · State house district · primary
How do we calculate vote impact?
Vote impact = representation (how much weight one vote carries here, the smaller the district's population, the higher the representation) + decisiveness (how likely this race is to be close, based on past results and number of candidates).
Representation: Average · 54 out of 100
This district is mid-sized for its type, so each vote carries average weight. About 244,209 people live here.
score = 100 × ln(largest population ÷ this district's) ÷ ln(largest ÷ smallest), rounded to 2 decimals = 100 × ln(275,769 ÷ 244,209) ÷ ln(275,769 ÷ 221,081) = 54.99, comparing state house districts in AZ (grades: 66+ high, 33+ average, otherwise low)
Decisiveness: Unknown
No past results for this contest yet.
Average representation + unknown decisiveness → Average vote impact.
Some data is missing, so this rating is based on partial information and capped at "High".
This office is responsible for:
- Voting on state laws and the state budget
- Representing their district in the statehouse
- Serving on committees that shape bills before final votes
- Helping district residents deal with state agencies
Affected Areas: Environment and Public Health, Reduce Wealth Gap, Anti-Corruption, Government Efficiency, Healthcare Affordability, Government Spending Reduction, Public Safety and Crime Control, Housing Affordability, Social Programs and Welfare, Public Education Quality, Gun Control, Women's Reproductive Rights, Election Integrity, Personal Income Tax Reduction, Data Privacy, Civil Rights, Corporate Accountability, Public Infrastructure
Candidates
Bob Dohse
Republican · declared
Bob Dohse is an engineer who describes using technical reasoning and a broad systems perspective to address complex problems. His background also includes community service in the Tucson area.
Chris Mathis
Democratic · Incumbent · declared
Chris Mathis is an Arizona state representative, elder-law attorney, and professor of practice at the University of Arizona law school, where he teaches health-care law and aging. He serves on the Natural Resources, Energy and Water; Ethics; Health and Human Services; and Rules committees.
Records: Civil Rights 2 for, Corporate Accountability 1 for, Election Integrity 1 against, Environment and Public Health 2 for, Healthcare Affordability 3 for, Public Safety and Crime Control 1 for
Nancy Gutierrez
Democratic · Incumbent · declared
Nancy Gutierrez is an Arizona state representative, assistant minority leader, ranking member of the House Education Committee, and member of the Appropriations Committee. A credentialed educator since 1994, she taught at Tucson High from 2013 through 2025 and previously chaired its physical-education department.
Records: Environment and Public Health 1 for, Government Spending Reduction 1 against, Gun Control 1 for, Public Education Quality 1 for, 1 against, Public Safety and Crime Control 1 against, Social Programs and Welfare 1 for
Election sources
Source: apps.arizona.vote
Source: azsos.gov
Source: azsos.gov