California Democratic Party backs Proposition 40 billionaire net-worth tax after internal pushback

California Democratic (CADEM) Party leaders announced Sunday they will back Proposition 40, a statewide ballot measure that would levy a one-time tax equal to 5 percent of the net worth of California’s 200 billionaires, setting up a new internal dispute within the California Democratic Party over the proposal’s politics and potential economic impact. According to CADEM, the decision came after the party’s executive board voted to endorse Proposition 40 despite resistance from within the party. The Hill reported that the endorsement cleared the executive board by a narrow margin, underscoring how divisive the measure has been among Democrats even before voters consider it. The proposal, identified by proponents as Proposition 40, is framed around collecting revenue from billionaires in California through a tax tied to net worth rather than income. CADEM’s endorsement reflects the party’s decision to treat the measure as a priority for its statewide electoral strategy, even as some Democrats have argued against it. The endorsement also follows public objections from within the party ranks, including opposition attributed by The Hill to California Democrats such as the state’s governor. That disagreement highlights the tension between party leadership and other prominent Democratic officeholders on the question of whether a net-worth-based tax is appropriate policy and whether the measure would align with the state’s broader fiscal and regulatory goals. Proposition 40 would place the decision directly before California voters, meaning the CADEM endorsement is not the final step in the policy’s path. Ballot measures in California require certification and appear on scheduled election ballots, with implementation dependent on how the measure is written and any subsequent legal or administrative action needed to operationalize the tax. If enacted, the measure would direct the state to calculate and collect the tax using a net-worth framework and would need to establish enforcement and compliance mechanisms, including how California defines eligibility and how the state assesses and verifies affected individuals’ financial holdings. Those practical details would likely become a focal point for opponents and supporters during the campaign period as well as in any post-election legal challenges. The CADEM endorsement may also affect how Democrats campaign down-ballot in California, since statewide ballot measure endorsements often influence the resources and messaging used by party-aligned groups. At the same time, internal opposition within the party suggests Democrats could still present conflicting arguments to voters on Proposition 40’s costs and design, even under a party-wide endorsement.