James K. Polk had the dubious distinction of having the shortest life span, and retirement after leaving office. James K. Polk was a one term U.S. President, who was largely forgotten serving from march 4, 1845 to March 4, 1849; Polk was the 9th Governor of the state of Tennessee, and served as President between John Tyler another forgotten President. Who assumed office with the sudden death of William Henry Harrison, and Zachary Taylor who was the second U.S. President to die in office. The time in the White House took its toll on James K. Polk, as do most Presidents its an extremely stressful line of work. Polk died in Nashville, TN at 3:15 pm on June 15, 1849 only 3 months after leaving office which was 103 days, as an ex-President.
James K. Polk oversaw the opening of the Smithsonian Institution, and the U.S. Naval Academy