The teachers group was also one of the leading proponents of the 2012 tax initiative. In addition to teachers and hospitals, the Prop. 55 campaign's backers include the Service Employees International Union and the California Medical Assn.
UPDATE 9:15 p.m. This story was modified to reflect the total raised is almost $28 million, not $38 million. The error was due to incomplete data on the state's campaign finance website.