The U.S. Department of Justice has signed off on Paramount Skydance's proposed acquisition of Warner Bros. Discovery , a person familiar with the matter told CNBC Friday. It's an important milestone for the roughly $110 billion deal that's drawn criticism over antitrust concerns, though it could still face legal challenges from state attorneys general. California AG Rob Bonta has been among the officials reviewing the proposal, and the deal "remains under investigation by the California