The US Justice Department on Thursday appealed last month’s ruling from a federal judge allowing AT&T to buy Time Warner in a mega-deal that could reshape the media-entertainment landscape. A notice of appeal was filed with a federal appeals court one month after Judge Richard Leon rejected the government’s efforts to block the $85 billion deal following a weeks-long antitrust trial. The decision delivered a stinging rebuke to Donald Trump’s administration in its first major antitrust court case.