Historians have ranked Abraham Lincoln the best U.S. president and James Buchanan the worst. Former President George W. Bush was ranked 36th out of the 42 men who had been chief executive by the end of 2008, according to a survey conducted by the cable channel C-SPAN.
Summary: On a valedictory tour prior to leaving office, President George W. Bush has admitted to a few previously unacknowledged errors, telling one interviewer that he was “unprepared for war” when he entered office and that his “biggest regret” was the failure of intelligence leading up to the Iraq invasion.