https://www.parks.ca.gov/?page_id=495
Supporters of California’s Proposition 40, a 2026 initiative proposing a one-time 5% wealth tax on billionaires, are actively lobbying in Washington. This movement comes as the initiative, which aims to fund Medi-Cal and other social programs, has qualified for the November ballot after surpassing the required signature threshold. Despite strong opposition from figures like Governor Gavin Newsom and tech billionaire Sergey Brin, proponents are working to influence federal policy that could impact the tax’s implementation.
The market for the California billionaire wealth tax initiative currently reflects a 30.5% probability of passage, slightly up from 30% a day ago, although down from 32% a week prior. The active lobbying in Washington could be seen as an attempt to bolster support and mitigate opposition efforts. The tax’s retroactive clause to January 1, 2026, remains a contentious point, with legislative negotiations ongoing.
Key Takeaways
Market activity suggests increased attention on the billionaire tax initiative as lobbying efforts in Washington intensify.








