The controversial billionaire tax measure has secured enough signatures to appear on the November ballot, according to the union leading the charge. “Supporters of the Healthcare Executive Compensation Act submitted more than one million signatures to the California Attorney General and county registrars across the state, a landmark step toward qualifying the measure for the November 2026 ballot,” the group said in a statement Sunday. The tax — proposed by the Service Employees International Union–United Healthcare Workers West — would impose a one-time 5% levy on California residents with assets exceeding $1 billion. The controversial billionaire tax measure is now headed for voters to decide on the November ballot. AFP via Getty Images The measure is opposed by many, including top Democrats like the state’s own governor Gavin Newsom, who has warned it could trigger an exodus of wealthy individuals and businesses.…