Despite the assassinations of three US Presidents, (Abraham Lincoln, James Garfield, and William McKinley) killing or attempting to harm a President wasn’t a federal crime until 1965, two years after JFK’s death. – WTF Fun Facts
Source: https://edition.cnn.com/2018/03/20/us/jfk-assassination-5-things/index.html
So there were 4 presidents assassinated?