California Proposition 43, a legislatively referred constitutional amendment on the November 3, 2026 ballot, would require two-thirds voter approval for citizen-initiated local special taxes starting January 1, 2027, closing a loophole from 2017 court rulings that had allowed such measures to pass by simple majority. The measure emerged from a June 2026 compromise in which lawmakers placed it on the ballot after the Howard Jarvis Taxpayers Association withdrew a broader initiative that would have applied the threshold retroactively and restricted real estate transfer taxes. Governor Gavin Newsom has opposed the proposition, aligning with local government and service advocates who argue it would constrain revenue for targeted programs such as housing and emergency services. Trader consensus favoring rejection at 55.5% reflects these partisan divides, the measure’s narrow scope compared with prior proposals, and typical patterns for tax-related ballot amendments near election day.