Having spent the past six weeks rhetorically slashing at his Republican rivals, it makes perfect sense that Donald Trump would eventually run out of targets and find himself in a war with the party’s media arm: Fox News. At the GOP primary debate Thursday night in Cleveland, Trump’s onstage clashes with the Fox moderators, and his postdebate complaints about the network’s treatment of him, were among the most talked-about story lines to emerge from the Quicken Loans Arena. What makes the confrontation all the more dramatic was that Fox News chairman Roger Ailes has, until this point, been a booster...
