On Sept. 14, 1901, President William McKinley died in Buffalo and shortly after Theodore Roosevelt took the oath of office for president.

President Trump has long celebrated William McKinley's tariff policies. See how those policies affected everyday Americans in ...

This proclamation was issued by Theodore Roosevelt just weeks after President William McKinley died, on Sept. 14, 1901, of wounds inflicted by an assassin a week earlier. In the week after the ...

Complete Guide to Theodore Roosevelt Inaugural National Historic Site in New York, including guided tours, history, park hours, directions, and so much more.

After William McKinley's assassination, Theodore Roosevelt arrives in Washington in 1901 as the youngest president of the United States.

Two years later, Roosevelt was appointed Assistant Secretary of the Navy by President William McKinley. In this role, T.R. vehemently pushed for war with Spain over the issue of Cuban independence.

McKinley to Roosevelt William McKinley. Not as much as Mr. Trump believes. He is convinced the Civil War veteran is his spiritual predecessor.

Elected after the closing of the American frontier to the west, McKinley found new ways to expand in the Pacific and Caribbean following the Spanish American War.

Here, however, Roosevelt celebrates the enduring principle of American unity, and of the courage it took — and takes — to preserve it.

Roosevelt influenced U.S. foreign policy even before he became president. As Assistant Secretary of the Navy under President William McKinley, he lobbied for a stronger Navy.

When President William McKinley seeks a new running mate, Theodore Roosevelt reluctantly agrees and they win the election of 1900.