It is common practice not to try to discern “history” while all, or most, of the actors involved are still alive...because bias is an inevitable part of any “analysis.”
Also, historians have lately become almost reflexively Leftist in their orientation - so naming Bush as the worst is hardly a shocker.
Yeah, he sucked in many ways, but he was hardly the worst by a long shot. Let’s compare Bush 43 and Hussein in 30 years, when most of their aides and the media types from now are pushing up daisies - methinks that Bush will turn out to be mediocre, while Hussein will turn out to be at least far, far worse in every measure, if not an outright traitor...assuming that we even have a country at that point, and aren’t part of some caliphate, or a burned-out, EMP-d wasteland because of Hussein’s policies.
BJ is our Harding; Gore would never have been Coolidge, but he didn't get the chance. W is our Hoover. BHO thinks he is FDR; he is everything that was wrong with FDR, with nothing that was right, and that is another reason Obama deserves the prize.