What is the tone of the letter provide a quote to support your claim

It is the message from President Kennedy to Chairman Khrushchev and the tone is explained below with a quote

Explanation:

Nikita Khrushchev commenced the Soviet Union during part of the Cold War. Khrushchev's reputation was disintegrated by defects in his policies. John Kennedy is an American diplomat who worked as the thirty-fifth leader of the United States and he is the youngest president in the USA

The tone of the letter:

The tone was difficult and painful. "Assigned military bases literally throughout our country" "will withdraw its weapons from Turkey"