Ben Carson argued that being a good president the most important thing to have is a brain. He said this the first Republican debate.


1.) James K. Polk


IQ: 130.2
Polk is known as the “least known consequential president.” Polk presided over the Mexican War, expanding the size of the country and overhauled the nation’s finance system.

2.) President Grover Cleveland


IQ: 130.9
Cleveland cannot afford a college education, but that didn’t stop him from becoming a successful lawyer. Cleveland earned a reputation for his honesty and worked ethic.

3.) Richard Nixon


IQ: 131.0
Nixon’s presidency may be full of scandals, but there’s no doubting his intelligence. Before he resigned from office, Nixon accomplished some major foreign policy goals and pushed for environmental regulation.

4.) Dwight D. Eisenhower


IQ: 131.9
Eisenhower served as a five-star general in the Army during World War II and was the Supreme Commander of the Allied Forces in Europe before becoming president.

5.) Benjamin Harrison


IQ: 132.2
Benjamin Harrison had a successful career as a lawyer before and after his one-term presidency. He even represented the Republic of Venezuela against the United Kingdom.

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