Harper's article, Worst. President. Ever. by Scott Horton states:
"Among historians, there is no doubt into which echelon he falls–his competitors are Millard Fillmore, James Buchanan, Andrew Johnson, and Franklin Pierce, the worst of the presidential worst. But does Bush actually come in dead last?
Yes. History News Network’s poll of 109 historians found that 61 percent of them rank Bush as “worst ever” among U.S. presidents.
The data: History News Network’s poll of 109 historians found that 61 percent of them rank Bush as “worst ever” among U.S. presidents. Bush’s key competition comes from Buchanan, apparently, and a further 2 percent of the sample puts Bush right behind Buchanan as runner-up for “worst ever.” 96 percent of the respondents place the Bush presidency in the bottom tier of American presidencies. And was his presidency (it’s a bit wishful to speak of his presidency in the past tense–after all there are several more months left to go) a success or failure? On that score the numbers are still more resounding: 98 percent label it a “failure.”
Just think, though, there are some Americans who think he was among the very best: that's why they voted for him, TWICE!
So much for credibility and judgement, eh?