Carl Bernstein, of All the President’s Men fame, has a revealing commentary in the Guardian today, though revealing not entirely in a way he appears to understand. Bernstein highlights a story first disclosed earlier this month in the Washington Post by his former journalistic partner Bob Woodward that media mogul Rupert Murdoch tried to “buy the US presidency”.

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.

Murdoch’s efforts to put his own man in the White House failed because Petraeus decided he did not want to run for office. “Tell [Ailes] if I ever ran,” Petraeus says in the recording, “but I won’t … but if I ever ran, I’d take him up on his offer.”