He didn't retire. He was shot and killed on April 15, 1865. He was 42 days into his second term as President.
Presidency of Abraham Lincoln died on 1865-04-15.
Presidency of Abraham Lincoln was born on 1809-02-12.
Abraham Lincoln was the president when Abraham Lincoln was the president.
Wikipedia the name Abraham Lincoln.
He didn't.
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His presidency ended by an assassination.
As Abraham Lincoln was assassinated as president, he did not have a chance to retire.
He didn't.
John Wilkes Booth ended Lincoln's presidency with a bullet to the brain.
Abraham Lincoln was assassinated while he was in office.
The presidency of Abraham Lincoln was in crisis almost immediately. Several states in the South seceded from the Union shortly after he was elected and inaugurated.