Riding along the winding backroads of northwest Missouri, about a half-hour form my home, I sometimes stop at an old cemetery just outside Plattsburg. Right inside the entrance is a series of arrows pointing to a specific grave. That grave has a compelling brass marker which proclaims the man buried there was "President of the United States for one day ~ Mar. 4, 1849." After stopping at the cemetery I sometimes roll into Plattsburg where the townsfolk have erected a towering statue to the man, also proclaiming his presidency. On occasion, I've even gone on up the road, across the Missouri river and visited "The World's Smallest Presidential Library," which was built in his honor. The library is located in Atchison, Kansas, which was named after the man, David Rice Atchison.
Senator David Rice Atchison, a member of Platte Lodge #56 in Missouri, was President pro tempore of the United States Senate when Zachary Taylor was elected president. Inauguration day in 1849 fell on a Sunday and the devout Taylor refused to attend his swearing in on the sabbath, rescheduling it for the following day. Taylor's Vice President, Millard Fillmore, followed suit and James K. Polk's term had expired the previous day, technically leaving the presidency vacant. Constitutionally, Atchison was next in line for the office.
Hearing this quirky bit of news, Atchison's friend, Judge Willie Magnum, and a group of others descended on Atchison's house and tramped up to his bedroom in the middle of the night. There, with the confused Atchison in his nightgown, Judge Magnum administered the oath of office. Brother Atchison went back to sleep and spent the bulk of his "presidency" resting and reading in his home. He later said this about his auspicious day:
"It was in this way; Polk went out of office on the third of March 1849, on Saturday at twelve noon. The next day, the fourth, occurring on Sunday, General Taylor was not inaugurated. He was not inaugurated until Monday the fifth, at twelve noon. It was then canvassed among senators whether there was an interregnum (which means a time during which a country lacks a government). It was plain that there was either an interregnum or I was the President of the United States, being chairman of the Senate, having succeeded Judge Magnum of North Carolina. The judge waked me up at three o'clock in the morning and said jocularly that I was President of the United States and he wanted me to appoint him as Secretary of State. I made no pretense to the office, but if I was entitled in it I had one boast to make, that not a woman or child shed a tear on account of my removing anyone from office during my incumbency of the place."
Historians almost universally agree that Atchison was not officially the president. It is also true, however, that neither the outgoing president James K. Polk, nor Taylor were president on March 4. Duly inaugurated, who better than Brother Atchison to fill the gap? If you're not willing to agree that he was at least ex-officio President, just don't mention it around Atchison, Kansas or Plattsburg, Missouri.