Lincoln was assassinated during his presidency, so he never had any "post-presidency" activities.
yes
JFK's assassination ended his presidency.
He was a lawyer. A very good lawyer
John Wilkes Booth ended Lincoln's presidency with a bullet to the brain.
His presidency ended in 1999
His presidency ended by an assassination.
Lincoln wanted the south to come and be a united state again.
One by one, the seceded from the union and formed the Confederate States on America.
There was no period after his presidency, he was assassinated before his term ended.
Watergate
This is available on many websites devoted to US political history.