US vice-president Joe Biden listens to secretary of state Hillary Clinton at the National Prayer Breakfast in Washington in February 2010. According to Double Down by journalists Mark Halperin and John Heilemann, President Barack Obama’s top aides secretly considered replacing Biden with Clinton on the 2012 ticket in late 2011, when Mr. Obama’s re-election outlook appeared uncertain. Photograph: Luke Sharrett/The New York Times

There is a hilarious episode in a new tell-all book about the 2012 presidential election, a tome that has buzzed Washington this past week, that shows(...)