Media Matters, the George Soros-backed legion of liberal agit-prop shock troops based in the nation's capital, has declared war on Fox News, and in the process quite possibly stepped across the line of legality. David Brock, MM's founder, was quoted Saturday by Politico promising that his organization is mounting "guerrila warfare and sabotage" against Fox News, which he said "is not a news organization. It is the de facto leader of the GOP, and it is long past time that it is treated as such by the media, elected officials and the public.” To that end, Brock told Politico that...