Ulysses S. Grant
Before we start judging, note that the average Intelligence Quotient (IQ) ranges from 85 to 115. With that in mind, Grant’s IQ of 130 is quite respectable. However, it apparently didn’t help him sniff out the Whiskey Ring affair, concealed tax revenue, and other controversies that went down under his leadership. Let’s not forget that he became the 18th President of the United States of America, and the commander-in-chief of the Union army during the American Civil War.