William McKinley (January 29, 1843 – September 14, 1901) was the 25th president of the United States, serving from 1897 until his assassination in 1901. A member of the Republican Party, he led a realignment that made Republicans largely dominant in the industrial states and nationwide for decades. McKinley successfully led the U.S. in the Spanish–American War and oversaw a period of American expansionism, with the annexations of Hawaii, Puerto Rico, Guam, the Philippines, and American Samoa.
. . .On the morning of September 13, McKinley's condition deteriorated. Specialists were summoned; although at first some doctors hoped that McKinley might survive with a weakened heart, by afternoon they knew that the case was hopeless. Unknown to the doctors, gangrene was growing on the walls of McKinley's stomach and slowly poisoning his blood. McKinley drifted in and out of consciousness all day, but when awake he was a model patient. By evening, McKinley too knew he was dying, "It is useless, gentlemen. I think we ought to have prayer." Relatives and friends gathered around the death bed. The first lady sobbed over him, saying, "I want to go, too. I want to go, too." Her husband replied, "We are all going, we are all going. God's will be done, not ours", and with final strength put an arm around her. He may also have sung part of his favorite hymn, "Nearer, My God, to Thee", although some other accounts have the first lady singing it softly to him.
At 2:15 a.m. on September 14, 1901, McKinley died. Theodore Roosevelt rushed back to Buffalo and took the oath of office as president. Czolgosz, put on trial for murder nine days after McKinley's death, was found guilty, sentenced to death on September 26 and executed by electric chair on October 29, 1901.