On September 14, 1901, President William McKinley died in Buffalo, New York, eight days after being shot by Leon Czolgosz. Although doctors initially believed he would recover, infection set in around his wounds. His death made him the third U.S. president to be assassinated. Vice President Theodore Roosevelt was sworn in as president later that day in Buffalo. Roosevelt’s presidency brought a stronger federal role in economic regulation and conservation, reshaping national politics in the early twentieth century.
