-The names Lincoln and Kennedy each contain seven letters.

-Both were particularly concerned with civil rights.

-Both Presidents' wives lost a child while living in the White House.
Both Presidents were shot while seated next to their wife.  Both Presidents were shot on a Friday. Both were shot in the head.

-Lincoln's personal secretary, whose name was John (Nicolay), advised him not to go to the theater.  Kennedy's personal secretary, whose name was (Evelyn)Lincoln, advised him not to go to Dallas.

-Both were assassinated by Southerners.  Both were succeeded by Southerners.  Both successors were named Johnson.

-Andrew Johnson, who succeeded Lincoln, was born in 1808.

-Lyndon Johnson, who succeeded Kennedy, was born in 1908.

-John Wilkes Booth, who assassinated Lincoln was born in 1839.

-Lee Harvey Oswald, who assassinated Kennedy was born in 1939.

-Both assassins were known by their three names.

-Both names are comprised of fifteen letters.

-Both ran from the theater and was caught in a warehouse.

-Oswald ran from a warehouse and was caught in a theater.  Booth and Oswald were assassinated before their trials.

-Lincoln was shot in the Ford Theatre and Kennedy was shot while in a Ford Lincoln.