Arizona voters face Proposition 318 on the November 3, 2026 ballot, a legislatively referred measure that would require all schools and athletic associations to designate teams by biological sex recorded at birth and restrict restroom, locker room, and shower access accordingly. A recent Citizens Clean Elections Commission poll showed 62% overall support, including notable crossover from independents and some Democrats, aligning with national polling on sex-based categories in athletics. The Supreme Court’s June 2026 rulings upholding similar state laws in other jurisdictions removed prior legal obstacles and reinforced the existing Arizona sports policy. Partisan referral by Republican lawmakers, combined with Democratic opposition focused on enforcement and student impacts, creates the current near-even trader balance, with campaigns and turnout patterns in the final month likely to determine the outcome.