California voters face Proposition 43 on the November 3, 2026 ballot, a legislative constitutional amendment that would require a two-thirds supermajority for citizen-initiated local special taxes beginning in 2027, aligning them with the existing threshold for government-proposed measures. The closely contested odds reflect competing pressures from public employee unions, local government associations, and special districts opposing the change due to risks of reduced revenue for schools, infrastructure, and services, against taxpayer advocacy groups favoring stronger voter safeguards. Recent local tax measures have frequently passed under simple-majority rules, bolstering arguments for the status quo, while the measure stems from a June 2026 compromise that removed a broader initiative. Upcoming polling trends, campaign spending by affected interests, and voter sentiment on local revenue needs could shift the balance before election day.