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The Justice department is suing to block the proposed merger between AT&T and Time Warner. The challenge of a so-called vertical mergerย  is rare because the two parties operate in different parts of an industry. The WSJ has more:

On Monday,ย the Justice Department filed a lawsuitย challenging AT&Tโ€™s $85 billion cash-and-stock deal for Time Warner Inc. after a nearly 13-month review. It was around this time in 2011 that AT&T was forced to withdraw its application with the Federal Communications Commission forย a $39 billion takeoverย of wireless rival T-Mobile US Inc., amid opposition from antitrust and telecom regulators.

Mr. Stephenson has vowed to fight the Justice Department in court to proceed with a takeover of Time Warner. The deal aims to combine the TV and film producer with his companyโ€™s existing base of satellite and internet subscribers.

โ€œThe government contends that AT&T with 25 million TV customers and Turner with a single-digit share of all media watched will have unlawful market power, this defies logic and it is unprecedented,โ€ Mr. Stephenson said in a news conference on Monday.

In a statement Monday, AT&T general counsel David McAtee said the company would challenge the lawsuit, calling it โ€œa radical and inexplicable departure from decades of antitrust precedent.โ€

Justice maintains that it is open to a settlement with AT&T on the condition that the telecom giant sell DirectTV or some of Time Warnerโ€™s cable networks. AT&T says it prefers court and expects to win. We would expect AT&T to be the favorite if the case makes it to court.