The state Fair Political Practices Commission went to court  Thursday to try to find out who's behind a huge donation to defeat Governor Jerry Brown's tax measure.

    An Arizona group called Americans for Responsible Leadership made the $11 million donation last week  to a business-backed committee that's fighting the tax measure -- Proposition 30. The money is also helping the campaign for Prop 32,which would limit political fund-raising by unions.

    Ann Ravel is the FPPC chair.  “What is at stake is Democracy. It’s whether or not people from out of state or even in state who are giving an enormous amount of money to influence campaigns in California should be identified.

    A Superior Court judge scheduled a hearing for Tuesday on whether to require the Arizona group to provide more information about the donation.

     Two new statewide polls show that support for Prop. 30 has fallen to below 50 percent.