Harry S. Truman – 139.8
Harry S. Truman, the 33rd President of the United States, served from 1945 to 1953. He was elected to power just after the Second World War ended. He was a member of the army during World War I and is the only president to employ nuclear weapons. He was known for his stubbornness, and he reportedly exercised his veto power 180 times! Harry Truman’s IQ of 139.8 places him in the bottom quarter of all US presidents.
Harry S. Truman
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