A state judge on Wednesday ordered an Arizona nonprofit to hand over a wide range of records involving its $11-million donation to California political campaigns, a victory for the state’s campaign finance watchdog.

The Fair Political Practices Commission is trying to unmask the donors behind the Arizona group, and the case is being watched as a test of California regulations intended to prevent campaign contributors from anonymously routing money through nonprofits.

“This is a moment of truth for our campaign disclosure laws,” said Derek Cressman of Common Cause, an activist group that filed a complaint against the Arizona nonprofit.

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