The US Justice Department dispatched a federal prosecutor to observe ballot processing in Los Angeles on Friday, amid Donald Trump's unsubstantiated claims that California Democrats were rigging primary election results. Three days after voting closed, several key races — including the California governor's race — remained unresolved, with millions of ballots still to be counted, a delay experts attribute to the state's mail-in voting rules rather than any irregularity. California officials defended the process as thorough and lawful, while Trump's accusations have drawn concern from state leaders and election experts who warn the slow count is being exploited to spread misinformation about electoral integrity.