Thank you to ryanlentforamerica for playing along yesterday! The answer we were looking for was that of our 20th President, James Garfield.
President Garfield served less than one year (March 5, 1881 – September 19, 1881) as president before he was shot on July 2, 1881 in a Washington railroad station by an embittered attorney who had sought a consular post.
Mortally wounded, Garfield lay in the White House for about five weeks. During this time Alexander Graham Bell tried unsuccessfully to find the bullet with an induction-balance electrical device that he had designed. Then on September 6, Garfield was taken to the New Jersey seaside. For a few days he seemed to be recuperating, but on September 19, 1881, he died from an infection and internal hemorrhage.