Answer:
He knew the public and National Guard would not agree with his decision and he also recognized that, former President Abraham Lincoln was right, "A house divided against itself, cannot stand."
Step-by-step explanation:
The world escaped nuclear war in October 1962 largely because of the prudence of Kennedy and the belated prudence of Khrushchev. Though Kennedy had felt it necessary to be uncompromising in his demand for removal of the missiles from Cuba, he had been careful to put off to the last possible moment any action that could result in killing a Russian. Khrushchev had probably decided to drop his demand for quid pro quo removals from Turkey as a result of learning that a Soviet anti-aircraft missile in Cuba had shot down a US U-2 plane, killing the pilot. Kennedy and Khrushchev both recognised that, once blood had been spilled, it would be very hard to keep any crisis under control.