Four presidents have been assassinated in office − Abraham Lincoln and James Garfield in the 19th century and William McKinley and John F. Kennedy in the 20th − and every modern president has been the target of serious assassination plots.

Theodore Roosevelt (Teddy Roosevelt) was the 26th U.S. President, known for conservation, trust-busting, and a dynamic career. Explore his life and legacy.

FILE - An undated photo of William McKinley, 25th President of the United States. He was inaugurated in 1897, and again in 1901 just prior to being assassinated on Sept. 6, 1901. (AP Photo, File)

Roosevelt first assumed the presidency when President William McKinley was assassinated. September 6, 1901: President William McKinley Republican President William McKinley was shot to death in ...

After President McKinley's assassination she returned to Canton. At first she expressed a desire to join her husband, and prayed daily that she might die.

Following US-backed strikes on Iranian nuclear facilities, Iranian officials have openly threatened Donald Trump with assassination, including a potential drone attack at Mar-a-Lago. These threats are fueled by religious decrees and fundraising efforts,

William McKinley led a country defined by tariffs and colonial wars. There’s a reason Trump is so drawn to his legacy—and so determined to bring the liberal international order to an end.

President Trump has long celebrated William McKinley's tariff policies. See how those policies affected everyday Americans in the 1890s.