Source for Popular Vote data: South Carolina Secretary of State, "Statement of the Whole Number of Votes Cast for Presidential and Vice-Presidential Electors at the General Election Held in South Carolina on November 5, 1968," Supplemental Report of the Secretary of State O. Frank Thornton to the General Assembly of South Carolina Election November 5, 1968 and Primary of June 11, 1968 (Columbia, 1969)