"Krushchev's public rhetoric also made Soviet-American reconciliation difficult, if not impossible, early in Kennedy's presidency. On January 6, 1961, the Soviet leader declared his country would support "wars of national liberation" in the underdeveloped world. Krushchev's declaration, wrote the president's confidante and historian Arthur Schlesinger, Jr., "alarmed Kennedy more than Moscow's amiable signals assuaged him." Although Kennedy was willing to negotiate an end to the Cold War, the Third World challenge which Krushchev threw at him would have to be dealt with first."
January 1, 1970
https://en.wikiquote.org/wiki/Nikita_Khrushchev