Lyndon Johnson actually said...
ON BEHALF of the people of the United States of America, I extend cordial greetings and best wishes to the peoples of the Union of Soviet Socialist Republics on the occasion of their national holiday, which this year marks the 50th anniversary of the establishment of the Soviet Government.
Context
Message to President Podgorny on the Occasion of the 50th Anniversary of the Establishment of the Soviet Government.
11/06/1967