Dave might be floundering on Europe this morning but one of his potential successors is on top form. When asked by a Tory MP to account for Tim Shipman’s O-levels scoop last month, Michael Gove responded in a typically cutting fashion: “I have come to the conclusion that leaks appear to be part of political life“. Guido finds that the stories drip out a lot more regularly when the party’s poll ratings are on the slide…