AT&T announced that it was buying Time Warner for $85.4 billion in October 2016. The Justice Department sued last year to block the merger, citing concerns that AT&T, owner of satellite television provider DirecTV, could charge rival distributors more for Time Warner content, resulting in higher prices for consumers. The outcome of the trial could have implications for future deals in the telecom and media industries, as well as vertical mergers, where companies combine with their suppliers. A federal judge said Tuesday that AT&T's $85.4 billion purchase of Time Warner is legal, clearing the path for a deal that gives...