Of the individuals elected president of the United States, four died of natural causes while in office (William Henry Harrison, [1] Zachary Taylor, [2] Warren G. Harding [3] and Franklin D. Roosevelt), four were assassinated (Abraham Lincoln, [4] James A. Garfield, [4] [5] William McKinley [6] and John F. Kennedy) and one resigned from office …
https://en.wikipedia.org/wiki/List_of_presidents_of_the_United_States_by_time_in_office

