William Howard Taft – 139.5
While he appears rather low on the list, William Howard Taft had an IQ of 139.5 and remains the only person to have presided over both the executive and judicial branches of government. After being the president from 1909 to 1913, he later became the 10th Chief Justice of the United States Supreme Court. William H. Taft was the 27th president of the United States and he was the only head of state who went on to become the US Chief of Justice. He grew up in Ohio and later matriculated at Yale University to take up law. He was allegedly part of the secret society Skull and Bones while attending the prestigious university. During his twenties, he enjoyed a successful law career and later became a judge. He was in office from 1909 until 1913 and under his administration paid more attention to East Asia than any other region. Taft also intervened in Latin America where he either broke down or set up governments.
William Howard Taft
James Buchanan – 139.6
The 15th president didn’t improve much from his predecessor. Most historians will recall that James Buchanan had made some lofty goals for himself as president. Buchanan promised to reach the great heights of George Washington during his presidency. James Buchanan joins the presidents who had an IQ of 139. Unfortunately, he didn’t quite get there.
James Buchanan
