Nichols writes: "Bernie Sanders is not burning with presidential ambition. He doubts that he would consider bidding for the nation's top job if another prominent progressive was gearing up for a 2016 run that would provide a seriously-focused and seriously competitive populist alternative to politics as usual."



Sen. Bernie Sanders at a markup meeting of the Senate Energy and Natural Resources Committee, 03/21/13. (photo: Win McNamee/Getty Images)