Here is a list of notable U.S. politicians who were either assassinated or targeted for assassination:

Assassinated U.S. Politicians:

Donald Trump
On July 13, trump was shot during a rally in Butler, Pennsylvania, and a bullet grazed his ear.
 
Abraham Lincoln (1809–1865)

Position: 16th President of the United States
Assassinated: april 14, 1865, by john Wilkes Booth
Context: Lincoln was shot at Ford's Theatre just days after the Civil war ended.

James A. Garfield (1831–1881)

Position: 20th President of the United States
Assassinated: July 2, 1881, by Charles J. Guiteau
Context: Garfield was shot at a Washington, D.C. train station and died two months later.

William McKinley (1843–1901)

Position: 25th President of the United States
Assassinated: september 6, 1901, by Leon Czolgosz
Context: McKinley was shot during a public event and died eight days later.

John F. Kennedy (1917–1963)

Position: 35th President of the United States
Assassinated: november 22, 1963, by Lee Harvey Oswald (though there are various conspiracy theories)
Context: Kennedy was shot while riding in a motorcade in Dallas, Texas.

Robert F. Kennedy (1925–1968)

Position: U.S. senator from New York
Assassinated: june 5, 1968, by Sirhan Sirhan
Context: He was shot while campaigning for the Democratic presidential nomination.

Martin Luther king Jr. (1929–1968)

Position: Civil rights leader (not an elected politician, but highly politically influential)
Assassinated: april 4, 1968, by james Earl Ray
Context: king was shot in Memphis, Tennessee, while standing on a motel balcony.

Huey Long (1893–1935)

Position: U.S. senator from Louisiana, former governor of Louisiana
Assassinated: september 8, 1935, by Carl Weiss
Context: Long was a controversial populist politician, and he was shot at the Louisiana State Capitol.

Harvey Milk (1930–1978)

Position: Member of the san francisco Board of Supervisors
Assassinated: november 27, 1978, by Dan White
Context: Milk was one of the first openly gay elected officials in the U.S. and was killed alongside Mayor George Moscone.
Politicians Targeted in Assassination Attempts:

Theodore Roosevelt (1858–1919)

Position: 26th President of the United States
Targeted: october 14, 1912, by john Schrank
Context: Roosevelt was shot in the chest while campaigning for the presidency in 1912 but survived and gave a speech before seeking medical attention.

Gerald ford (1913–2006)

Position: 38th President of the United States
Targeted: Two attempts in 1975
• First attempt: Lynette "Squeaky" Fromme, a Manson Family member, tried to shoot him in Sacramento, but the gun did not fire.
• Second attempt: sara Jane Moore attempted to assassinate him in san francisco but missed.

Ronald Reagan (1911–2004)

Position: 40th President of the United States
Targeted: march 30, 1981, by john Hinckley Jr.
Context: Reagan was shot in Washington, D.C., but survived after emergency surgery.

Gabrielle Giffords (1970–)

Position: U.S. Representative from Arizona
Targeted: january 8, 2011, by Jared Lee Loughner
Context: Giffords was shot in the head during a public event in Tucson, Arizona. She survived but suffered severe brain injuries.

Andrew Jackson (1767–1845)

Position: 7th President of the United States
Targeted: january 30, 1835, by richard Lawrence
Context: Jackson survived an assassination attempt when both of the assailant's pistols misfired.

These incidents underscore the threats that political leaders often face, many of which have altered the course of U.S. history.