California's Dark-Money Investigation Is Making Conservatives Sweat

Investigators with California's election watchdog and attorney general's office are hot on the trail of the true source of millions in dark money spent to defeat two hard-fought ballot propositions last fall. The wide-ranging probe has conservatives worried that a network of nonprofit groups used to move secret money around the country could be in for some unwanted exposure. The investigation, led by the state's nonpartisan Fair Political Practices Commission, has already done more than most wat...