If you were asked the trivia question, "Name the Presidents of the United States that came from Missouri," one would easily come up with the answer Harry S Truman. However, when the buzzer rings awaiting a second answer, you may not come up with it. David Rice Atchison would be the second answer.
Some made light of the fact that President Obama did a private oath on Sunday and then a formal one on Monday. Well this could be for good reason as the President's term goes from Jan. 20 to Jan. 20. However, with the Jan. 20 occurring on a Sunday this year, we could have run into a situation similar to why it is speculated that Atchison was President for one day.