California Proposition 4, a legislatively referred measure scheduled for the November 3, 2026 ballot, would repeal the state's longstanding ban on public financing of campaigns under the Political Reform Act. Trader consensus favoring rejection at 56.5% reflects organized opposition from groups such as the California Taxpayers Association, which highlights ongoing administrative costs and the use of taxpayer funds for political activity. Reform organizations including the League of Women Voters of California and Common Cause have launched support campaigns since early 2026 following Governor Newsom's signing of the enabling legislation in 2025. Historical voter rejection of prior public financing proposals and the measure's placement amid multiple competing propositions on the same ballot contribute to the current implied probability.