#21: James Buchanan
Every president that has ever been elected to office in the United States has something special about him, no matter what. When it comes to James Buchanan had two things that separated him from any other president that had come before or after him. He is the only president to ever be elected from the state of Pennsylvania and the only one to never marry.
With an IQ of 139.6, we’re pretty sure his brains weren’t the thing keeping the 15th president of the United States from finding his soulmate. Having served as president immediately before the Civil War, he left his predecessor, Abraham Lincoln, with significant issues to deal with.