State Senator - District No. 4
July 21, 2026 · State Senate District 4; Arizona · State senate 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 · 50 out of 100
This district is mid-sized for its type, so each vote carries average weight. About 246,417 people live here.
score = 100 × ln(largest population ÷ this district's) ÷ ln(largest ÷ smallest), rounded to 2 decimals = 100 × ln(275,769 ÷ 246,417) ÷ ln(275,769 ÷ 221,081) = 50.91, comparing state senate 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".
State Senator is responsible for:
- Voting on state laws and the state budget
- Representing their district in the state senate
- Confirming certain governor appointments in many states
- 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
Aaron Lieberman
Democrat · declared
Aaron Lieberman is an Arizona entrepreneur, early-childhood-education nonprofit founder, and former Democratic member of the Arizona House of Representatives running for the state Senate in Legislative District 4. He served in the House from 2019 through 2021. Lieberman co-founded and led Jumpstart and Acelero Learning, later worked with New Profit and Impello Ventures, and is the founder and chief executive of Buzze, an Arizona company focused on electric-vehicle charging for multifamily housing.
Records: Civil Rights 2 for, Election Integrity 2 against, Healthcare Affordability 1 for, Housing Affordability 1 for, Personal Income Tax Reduction 1 against, Public Education Quality 1 for, 1 against, Public Safety and Crime Control 1 for, 1 against, Social Programs and Welfare 1 for, Women's Reproductive Rights 2 for
Carine Werner
Republican · Incumbent · declared
Carine Werner is the Republican Arizona state senator for Legislative District 4 and a member of the Scottsdale Unified School District governing board. She joined the Senate in 2025 and in 2026 chairs the Health and Human Services Committee, serves as vice chair of the Education Committee, and sits on Appropriations. Werner immigrated to the United States at age 11 and co-owns a real-estate consulting firm with her husband.
Records: Civil Rights 4 against, Corporate Accountability 1 for, 1 against, Data Privacy 1 against, Election Integrity 1 for, Environment and Public Health 1 for, Government Efficiency 1 for, Government Spending Reduction 1 against, Healthcare Affordability 1 against, Personal Income Tax Reduction 1 for, Public Infrastructure 1 for, Public Safety and Crime Control 5 for
Election sources
Source: azsos.gov
Source: azsos.gov