Arizona Supreme Court Upholds Donor Disclosure Law for Political Ads
Arizona Supreme Court upheld a donor disclosure law for political ad sponsors in a 4-3 ruling.
Why it matters: The ruling strengthens transparency in campaign finance by requiring major donor disclosure. It also sets a precedent for balancing free speech and election law challenges nationwide.
- The 4-3 decision occurred on June 29, 2026, affirming the constitutionality of Proposition 211.
- Proposition 211 requires disclosure of donors contributing more than $5,000 when groups spend over $50,000 on political ads.
- Over 70% of Arizona voters approved Proposition 211 in the November 2022 election.
- The court allowed an as-applied challenge to proceed on claims that disclosure requirements may chill free speech.
On June 29, 2026, the Arizona Supreme Court issued a narrow 4-3 decision upholding Proposition 211, also known as the Voters' Right to Know Act. This voter-approved law mandates that groups spending over $50,000 on political ads must disclose donors contributing more than $5,000. The law also requires detailed disclosure about indirect donors whose funds ultimately support the covered entities, enhancing transparency in campaign financing.
Proposition 211 was passed with strong voter support, gaining over 70% approval in the November 2022 election. Its goal is to let Arizonans know who is funding political advertisements that influence elections.
The court dismissed most challenges to the law’s constitutionality. However, it allowed an as-applied challenge to proceed, giving plaintiffs the opportunity to prove that the disclosure requirements might impose actual harm by chilling free speech in specific circumstances under the Arizona Constitution.
Trevor Potter, president of the nonpartisan Campaign Legal Center, praised the ruling: "Arizona voters can celebrate today's decision because the state Supreme Court has affirmed Arizonans’ right to know who is spending big money to influence their vote by upholding Proposition 211."
This decision could influence similar legal debates in other states over campaign finance transparency and donor disclosure laws, particularly balancing transparency goals with free speech protections.
For the full opinion, see the Arizona Supreme Court ruling. Additional reporting is available from AZ Mirror, and the Campaign Legal Center's press release.
By the numbers:
- 70% — Percentage of Arizona voters approving Proposition 211 in 2022
- $50,000 — Spending threshold requiring donor disclosures for political ads
- $5,000 — Minimum donation amount triggering disclosure under the law
- 4-3 — Arizona Supreme Court vote upholding the law
Yes, but: The court allowed an as-applied challenge to continue, meaning specific plaintiffs can still argue the law’s disclosure rules chill free speech in certain contexts.
What's next: Plaintiffs in the as-applied challenge will attempt to demonstrate actual harm from the law’s requirements, potentially shaping future litigation on campaign finance disclosure.