Why it's complicated for Justice Dept to ask AT&T to sell CNN

Time Warner's Jeff Bewkes and AT&T's Randall Stephenson before testifying about the deal. Photo: Evan Vucci / AP

If the U.S. Justice Department were to sue over its demands that AT&T sell Turner (owner of CNN and other channels) or DirecTV in order to have its $85 billion purchase of Time Warner approved, as reported Wednesday, lawyers say the regulators will be fighting decades of precedent.

Why it matters: Speculation is swirling about the DOJ's motives, in light of President Trump's campaign trail promise to block the deal, and his vocal disdain for CNN's coverage.