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 had been legally insane at the time of the shooting (because God had taken away his free will), he was not really medically insane, which was one of the major causes of the rift between him and his defense lawyers. Edward Charles Spitzka, a leading alienist, testified as an expert witness. Spitzka had stated that it was clear "Guiteau is not only now insane, but that he was never anything else." While on the stand, Spitzka testified that he had "no doubt" that Guiteau was both insane and "a moral monstrosity". Spitzka came to the conclusion that Guiteau had "the