Gun violence in the United States been made on U.S. presidents (over one-fifth of all presidents); four were successful, three with handguns and one with a rifle. Abraham Lincoln survived an earlier attack, but was killed using a .44-caliber Derringer pistol fired by John Wilkes Booth. James A. Garfield was shot two times and mortally wounded by Charles J. Guiteau using a .44-caliber revolver on July 2, 1881. He would die of pneumonia the same year on September 19. On September 6, 1901, William McKinley was fatally wounded by Leon Czolgosz when he fired twice at point-blank range using a .32-caliber revolver. Despite only being struck
Charles J. Guiteau probing the wound with unwashed hands and non-sterilized instruments, Garfield died on September 19, eleven weeks after being shot. Most modern physicians familiar with the case state that Garfield would have easily recovered from his wounds with sterile medical care, which was common in the United States a decade later, while Candice Millard argues that Garfield would have survived Guiteau's bullet wound had his doctors simply left him alone. However, Garfield's biographer Allan Peskin stated that medical malpractice did not contribute to Garfield's death; the inevitable infection and blood poisoning that would ensue from a deep bullet wound resulted in