A taped conversation shows that in early 2011 Murdoch sent Roger Ailes, the boss of his most important US media outlet, Fox News, to Afghanistan to persuade Gen David Petraeus, former commander of US forces, to run against Barack Obama as the Republican candidate in the 2012 presidential election. Murdoch promised to bankroll Petraeus’ campaign and commit Fox News to provide the general with wall-to-wall support.