Franklin Pierce – 147.4
The 14th president of the United States was nothing short of a controversial head of state. He called the abolitionist movement “a fundamental threat to the unity of the nation”. Knowing this, it makes sense that this Democratic president signed the Kansas-Nebraska act. Franklin Pierce having an IQ of 147.4 puts him above the average president by just one point. This act effectively allowed each state to decide what its stance on slavery was.
John Tyler – 148
John Tyler took on the title of the 10th President of the United States after the demise of William Henry Harrison. He was actually the first person to replace a president who died while in office. In other words, he was the first president who had not been elected and he was the head of state from 1841 to 1845. Regarding slavery, Tyler allowed the states to decide about this and several other issues. He earned quite a number of enemies in Congress thanks to his passive stance and he was dubbed “His Accidency”. Having had an IQ of 148, John Tyler was definitely intelligent. That’s even more impressive when you consider how long ago he was president. The first attempted impeachment happened during his term as well, though it did not succeed. When it comes to international issues, he negotiated treaties with China and Britain.