U.S. Rep. Ro Khanna is set to join California labor unions and working families in San Jose on Tuesday as supporters of Proposition 40 step up their campaign for the proposed California Billionaire Tax.
Khanna will appear alongside workers from several major unions, including the Teamsters and SEIU-UHW, at the South Bay Labor Council Hall at 10:30 a.m. Pacific time. The rally comes after a series of major endorsements for the measure from California Democrats and organized labor.
The California Democratic Party, California Nurses Association and California Federation of Labor Unions, AFL-CIO, have all backed Prop 40 this month, according to the campaign supporting the measure.
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Supporters are presenting the ballot initiative as a way to raise money for healthcare, public schools and food assistance while requiring the state’s wealthiest residents to contribute more in taxes.
A recent poll of likely 2026 California voters cited by the Prop 40 campaign found that 57% of voters support the billionaire tax, compared with 38% who oppose it, giving the proposal a 19-point lead statewide.
Support is even stronger among Democratic and union voters. According to the same polling cited by the campaign, 80% of Democrats and 70% of union households back the proposal. The campaign also said 63% of teachers support Prop 40.
The measure has attracted backing from several prominent political and labor groups. Among its supporters are U.S. Sen. Bernie Sanders, Khanna, Teamsters California, AFSCME California, SEIU-UHW, the Committee of Interns and Residents, UNITE HERE locals, AFT Local 1521, Disability Voices United, Oxfam America and Color of Change.
Prop 40 qualified for the ballot after supporters submitted more than 1.6 million signatures from California voters. The campaign said that figure was nearly twice the number required for ballot qualification.
If approved, the measure would direct funds toward healthcare and other public services. Supporters say the money would help keep hospitals and emergency rooms operating, protect health insurance coverage and limit increases in healthcare premiums.
The campaign also argues that the measure could help protect public school jobs and support food assistance programs for families.
The push for Prop 40 comes as California faces continued debate over healthcare funding and the impact of federal budget decisions on the state. The campaign has linked the proposed tax to cuts it says were included in President Donald Trump’s “Big, Ugly Bill,” arguing that reduced federal healthcare funding could leave millions of Californians without coverage and increase premiums.
Prop 40 supporters say the billionaire tax is needed to offset those pressures and ensure California’s wealthiest residents contribute more toward essential public services.
Tuesday’s San Jose rally is expected to reflect the growing alliance between labor groups, Democratic leaders and community organizations backing the proposal as the campaign moves toward the 2026 election.