Straight dope on Presidential stupidity
who was the most stupid president
near the top of everyone's list you're sure to find Warren G. Harding, probably the nation's least competent chief executive, who described himself as "a man of limited talents from a small town. . . . I don't seem to grasp that I am president." Among presidents since FDR, political scientist Fred I. Greenstein (Presidential Difference: Leadership Style From FDR to Clinton) cites Harry Truman and Ronald Reagan as being "marked by cognitive limitations," although even detractors would concede they had their gifts.