California Proposition 4, referred by the legislature via SB 42 and scheduled for the November 2026 ballot, would repeal the 1988 voter-approved ban on public campaign financing and authorize state or local governments to create optional matching-fund or grant programs subject to spending limits, eligibility rules, and restrictions against using earmarked funds for education, transportation, or public safety. Supporters including Common Cause, the League of Women Voters, and labor groups argue it would curb special-interest dominance, while the California Taxpayers Association and fiscal opponents highlight taxpayer costs and favor retaining the longstanding prohibition. With the vote still months away and limited organized opposition visible as of mid-2026, trader sentiment reflected in the slight No lean appears driven by historical voter resistance to public funding of campaigns and standard base-rate skepticism toward new government spending programs.