Since 1865, attempts have been made on the lives of one of every four US presidents. One of every five US presidents has been assassinated since then. Here is the list of all US presidents who were assassinated while they were still serving as the POTUS
At 10:15 PM on April 14, 1865, Booth, a famous actor, enters Lincoln's private box as Lincoln, his wife, and friends watch a performance at Ford's Theatre. Booth shot Lincoln in the head before leaping onto the stage and yelling "Sic Semper Tyrranis" ("Thus ever to tyrants," the motto of the state of Virginia).
Guiteau, a livid office seeker, stalked Garfield for days before waiting for the president in the Baltimore and Potomac railway station in Washington, D.C. President Garfield was shot twice by Guiteau; the first shot hit his arm while the second shot him in the back.
When President McKinley attempted a handshake at the Pan-American Exhibition in Buffalo, New York, Czolgosz approached and shot him twice in the chest. He moved forward again, intending to fire a third shot, but a bodyguard wrestled him to the ground.
Oswald fired one bullet at Kennedy from a window in the Texas School Book Depository Building while the president rode in a convertible through downtown Dallas at the time.
Attempts were also made at the lives of US President Andrew Jackson in 1835 and Theodore Roosevelt in 1912. However, while the shooter missed his target in the former case, Roosevelt did recover from the wound. The bullet remained in Roosevelt’s body until his death in 1919.