California Proposition 43 would raise the voter approval threshold for citizen-initiated local special taxes from a simple majority to two-thirds starting in 2027, aligning them with government-proposed measures while prohibiting certain charter city property taxes. The measure emerged from a June 2026 legislative compromise that withdrew a broader anti-tax initiative backed by the Howard Jarvis Taxpayers Association. Trader odds near 50 percent reflect competing pressures: support from fiscal conservatives seeking to constrain local revenue measures versus opposition from cities, counties, and service advocates concerned about reduced funding flexibility for infrastructure, housing, and public programs. Campaign activity, endorsements, and turnout patterns in the final weeks before the November 3 election remain key variables that could alter the balance.