**Proposition 43 would amend the California Constitution to require a two-thirds voter approval threshold for citizen-initiated local special taxes starting January 1, 2027, closing a loophole created by 2017 court rulings that allowed simple-majority passage for voter-proposed measures while government-initiated special taxes already needed two-thirds support.** The measure emerged from a June 2026 legislative compromise with the Howard Jarvis Taxpayers Association that sidelined a more expansive citizen initiative, limiting its scope to future taxes without broad retroactive effects. Opposition from local governments, public employee groups, and service advocates highlights risks to revenue for housing, parks, transportation, and other programs, while supporters frame it as restoring Proposition 13 protections against low-turnout special-interest taxes. With the November 3 election weeks away and no dominant recent polling shifts or major campaign developments reported, trader consensus reflects the closely contested nature of the vote in a state where local revenue measures often draw majority support.