1901 – Leon Czolgosz, an unemployed anarchist, shoots and fatally wounds US President William McKinley at the Pan-American Exposition in Buffalo, New York. William McKinley, the 25th President of the United States, was shot on the grounds of the Pan-American Exposition at the Temple of Music in Buffalo, New York, on September 6, 1901, six months into his second term. He was shaking hands with the public when anarchist Leon Czolgosz shot him twice in the abdomen. McKinley died on September 14 of gangrene caused by the wounds. He was the third American president to be assassinated, following Abraham Lincoln in 1865 and James A. Garfield in 1881. Rapid economic growth marked McKinley's presidency. He promoted the 1897 Dingley Tariff to protect manufacturers and factory workers from foreign competition and in 1900 secured the passage of the Gold Standard Act. McKinley hoped to persuade Spain to grant independence to rebellious Cuba without conflict, but when negotiation failed he led the nation into the Spanish-American War of 1898. The United States victory was quick and decisive. As part of the peace settlement, Spain turned over to the United States its main overseas colonies of Puerto Rico, Guam and the Philippines while Cuba was promised independence, but at that time remained under the control of the United States Army. The United States annexed the independent Republic of Hawaii in 1898 and it became a United States territory. Historians regard McKinley's 1896 victory as a realigning election in which the political stalemate of the post-Civil War era gave way to the Republican-dominated Fourth Party System, which began with the Progressive Era. McKinley was succeeded by Vice President Theodore Roosevelt. As an innovator of American interventionism and pro-business sentiment, McKinley's presidency is generally considered above average, though his highly positive public perception was soon overshadowed by Roosevelt.