**Proposition 4 would repeal California's 1988 ban on public campaign financing, authorizing the state and local governments to establish voluntary programs that match small-dollar contributions under spending limits, eligibility rules, and restrictions barring use of earmarked taxpayer funds.** The legislature referred the measure via SB 42 in 2025 with Democratic support and Republican opposition; it appears on the November 2026 ballot. Backers including the League of Women Voters of California, Common Cause, and labor groups argue it counters big-money influence, while the California Taxpayers Association highlights potential costs. With limited organized opposition and early-stage fundraising reported so far, trader consensus near 50% reflects uncertainty over voter reaction to public financing in a state long restricted by the prior ban, turnout dynamics, and any late-cycle spending or polling shifts on campaign finance reform.