The assassination attempt on Donald Trump follows a history of political violence targeting sitting or prospective presidents in the US.
Since the nation's founding, four presidents have been killed and several others targeted, as were candidates.
Here's a look back at some of the assassinations and near-misses in American history.
1865 - Abraham Lincoln
Shot dead by John Wilkes Booth on 14 April 1865, Abraham Lincoln was the first president to be assassinated.
He was in a theatre with his wife Mary Todd Lincoln. He died the next morning after he was shot in the back of the head.
Two years before the assassination, during the Civil War, which was fought over slavery, Mr Lincoln issued the Emancipation Proclamation granting freedom to slaves within the Confederacy.
His support for black rights has been cited as a motive behind his killing.
Booth was shot and killed on 26 April after he was found hiding in a barn near Bowling Green in Virginia.
1881 - James Garfield
James Garfield was the second president to be assassinated, shot while walking through a train station in Washington on 2 July 1881 by Charles Guiteau.
Alexander Graham Bell, the telephone inventor, tried unsuccessfully to find the bullet lodged in Mr Garfield's chest using a device he designed specifically for the president.
The president lay at the White House for several weeks until he died in September, having held office for six months.
Guiteau was found guilty and executed in June 1882.
1901 - William McKinley
William McKinley was shot on 6 September 1901 after giving a speech in Buffalo, New York, where he had been shaking hands.
He was shot twice in the chest at close range.
While doctors had expected him to recover, gangrene set in around the bullet wounds and he died on 14 September, six months after opening his second term.
Leon Czolgosz admitted to the shooting and was put to death in the electric chair in October.
1933 - Franklin D. Roosevelt
The president-elect was not injured in a shooting in Miami in February 1933.
Chicago Mayor Anton Cermak was killed and Guiseppe Zangara was convicted and sentenced to death for the shooting.
1950 - Harry S. Truman
Harry S. Truman was staying at Blair House, across the street from the White House, in November 1950 when two gunmen broke in.
He was unhurt, but a policeman and one of the assailants were killed, while two other policemen were wounded.
Oscar Callazo was arrested and sentenced to death, but Mr Truman commuted his sentence to life in prison in 1952.
He was released from prison in 1979 by President Jimmy Carter.
1963 - John F. Kennedy
Perhaps the most notorious assassination came on 22 November 1963, when John F. Kennedy was shot as he rolled through Dealey Plaza in Dallas in the president's motorcade.
Hours after the assassination, police arrested Lee Harvey Oswald after finding a sniper's perch in a nearby building, the Texas School Book Depository.
Two days later, Oswald was being taken from police headquarters to jail when Dallas nightclub owner Jack Ruby rushed forward and shot him dead.
Mr Kennedy was succeeded by his vice president, Lyndon Johnson, who was sworn into office aboard Air Force One, making him the only president to take the oath of office on a plane.
1975 - Gerald Ford
Gerald Ford was unhurt in two assassination attempts within weeks of each other in 1975.
In the first attempt, Mr Ford was on his way to a meeting in Sacramento when Charles Manson disciple Lynette Fromme pushed through a crowd and drew a pistol at him.
The gun wasn't fired and Fromme was sentenced to prison and released in 2009.
Just 17 days later another woman, Sara Jane Moore, confronted Mr Ford outside a hotel in San Francisco, firing one shot and missing.
A bystander grabbed her arm as a second shot was attempted.
She was released from prison in 2007.
1981 - Ronald Reagan
After leaving a speech in Washington DC, Mr Reagan was shot by John Hinckley Jr, who was in the crowd in March 1981.
Mr Reagan recovered but his press secretary James Brady was partially paralysed.
Hinckley was arrested and sent to a mental hospital after a jury found him not guilty by reason of insanity. He was freed in 2022.
2005 - George W. Bush
George W. Bush was at a rally in Tbilisi, Georgia when a hand grenade was thrown towards him.
He was behind a bulletproof barrier and the grenade did not explode.
Vladimir Arutyunian was convicted and sentenced to life in prison.
