<Li> January 30, 1835: Just outside the Capitol Building, a house painter named Richard Lawrence attempted to shoot Jackson with two pistols, both of which misfired . Lawrence was apprehended after Jackson beat him severely with his cane . Lawrence was found not guilty by reason of insanity and confined to a mental institution until his death in 1861 . </Li> <Ul> <Li> February 23, 1861: The Baltimore Plot was an alleged conspiracy to assassinate President - elect Abraham Lincoln en route to his inauguration . Allan Pinkerton's National Detective Agency played a key role in protecting the president - elect by managing Lincoln's security throughout the journey . Though scholars debate whether the threat was real, Lincoln and his advisers took actions to ensure his safe passage through Baltimore . </Li> <Li> August 1864: A lone rifle shot fired by an unknown sniper missed Lincoln's head by inches (passing through his hat) as he rode in the late evening, unguarded, north from the White House three miles (5 km) to the Soldiers' Home (his regular retreat where he would work and sleep before returning to the White House the following morning). Near 11: 00 pm, Private John W. Nichols of the Pennsylvania 150th Volunteers, the sentry on duty at the gated entrance to the Soldiers' Home grounds, heard the rifle shot and moments later saw the president riding toward him "bareheaded". Lincoln described the matter to Ward Lamon, his old friend and loyal bodyguard . </Li> </Ul> <Li> February 23, 1861: The Baltimore Plot was an alleged conspiracy to assassinate President - elect Abraham Lincoln en route to his inauguration . Allan Pinkerton's National Detective Agency played a key role in protecting the president - elect by managing Lincoln's security throughout the journey . Though scholars debate whether the threat was real, Lincoln and his advisers took actions to ensure his safe passage through Baltimore . </Li> <Li> August 1864: A lone rifle shot fired by an unknown sniper missed Lincoln's head by inches (passing through his hat) as he rode in the late evening, unguarded, north from the White House three miles (5 km) to the Soldiers' Home (his regular retreat where he would work and sleep before returning to the White House the following morning). Near 11: 00 pm, Private John W. Nichols of the Pennsylvania 150th Volunteers, the sentry on duty at the gated entrance to the Soldiers' Home grounds, heard the rifle shot and moments later saw the president riding toward him "bareheaded". Lincoln described the matter to Ward Lamon, his old friend and loyal bodyguard . </Li>

Who are all the presidents that have been assassinated