Presidency of Chester A. Arthur

Chester A. Arthur's tenure as the 21st president of the United States began on September 19, 1881, when he succeeded to the presidency upon the assassination of President James A. Garfield, and ended on March 4, 1885. Arthur, a Republican, had been vice president for 199 days when he succeeded to the presidency.

Source: Wikipedia — Presidency of Chester A. Arthur (CC BY-SA 4.0)