The Kennedy Successor was Lyndon B. Johnson, who served as the 36th President of the United States from 1963 to 1969. He was sworn in as President on Air Force One following the assassination of John F. Kennedy in November 1963. Johnson was a Democrat from Texas and had previously served as the 37th Vice President of the United States from 1961 to 1963. He is best remembered for his 'Great Society' domestic programs and his role in the passage of civil rights legislation.