James Monroe – 138.6
If you didn’t know, James Monroe was President from 1817 until 1825. This founding father served as the United States’ fifth president. He was a popular contender for the job before, and he won it handily. Monroe was a soldier in the American Revolutionary War who became famous for his foreign policy, which he named “The Monroe Doctrine.” Monroe had the third-lowest IQ score, barely ahead of George W. Bush, with a score of 138.6. Despite this, a 138.6 score does not suggest being a slacker. The Wechsler IQ classification classifies it as “extremely high” intelligence.
Andrew Johnson – 138.9
Andrew Johnson was elected president after Abraham Lincoln was assassinated. He was the first president of the United States to be impeached, though. This is due to his efforts to reconcile the secessionist states into the Union while denying former slaves protection. The plan was criticized in Congress. He also had a 138.9 IQ, which made issues worse.