SEIU Leader's 15-Year-Old Assault Claim Roils 5% Billionaire Tax Vote

For employment and labor attorneys, the Regan matter is a live case study in internal investigations gone public. A commissioned report — not law enforcement findings — is now reshaping a ballot campaign, raising questions about privilege, defamation exposure, and the viability of claims that date back more than 15 years.

Dave Regan, president of the SEIU United Healthcare Workers West, is facing harassment and intimidation allegations detailed in an investigative report commissioned by SEIU California and obtained by The Associated Press. The report, completed in June 2026 but surfacing publicly in September, includes interviews with multiple current and former SEIU members who claim Regan pressured union leaders to support Proposition 40 — California's one-time 5% tax on billionaires designed to replace federal funding cuts to low-income healthcare. One allegation dates back to the 2000s and accuses Regan of physically assaulting an SEIU leader during a political dispute. Regan admits to using profanity with union leaders but denies the assault claim, asserting at a news conference that he will own his words but will not accept 'flat out lies.'

“

Dave Regan, president of the SEIU United Healthcare Workers West, is facing harassment and intimidation allegations detailed in an investigative report commissioned by SEIU California and obtained by The Associated Press.

The timing of the report's emergence is inseparable from the ballot fight. Proposition 40 goes before California voters in November 2026, and the measure has already fractured the state's Democratic coalition and labor movement. SEIU-UHW supports the tax, while the larger SEIU California has declined to take a position, a striking split for affiliates that typically coordinate on major policy fights. Regan's union contends opponents of the measure orchestrated the report's release to weaken the campaign, while Regan himself argues the allegations are being weaponized to defeat the tax. The report's June completion date means the document existed for months before public disclosure, raising questions about who controlled its distribution and why it was released just weeks before early voting and high-intensity campaign season.

The legal and governance implications are substantial even without formal charges. The report is an internal commissioned inquiry, not a law enforcement or court finding, so its allegations remain unproven and subject to dispute. The physical assault claim from more than 15 years ago likely faces a steep statute of limitations barrier in any civil or criminal context, but it could still be relevant in employment actions, union disciplinary proceedings, or fitness-for-office assessments. The defamation risk cuts both ways: if the allegations are false, Regan may have a claim against those who leaked or published them; if they are substantiated, his own public denials could aggravate liability or credibility issues. In either scenario, the report's existence and its leak create a discovery-heavy environment where internal documents, witness interviews, and communications may become evidence in future litigation or arbitration.