What was the state class where the new successor was formally installed on May 11 1966 one () ,?
State (class) Vacator Reason for change Successor Date of successors formal installation
89th United States Congress
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1-1847180-3
Senate
Senate
South Carolina (3) Olin D. Johnston (D) Died April 18, 1965 Donald S. Russell (D) April 22, 1965
South Carolina (3) Donald S. Russell (D) Successor elected November 8, 1965 Ernest Hollings (D) November 9, 1965
Virginia (1) Harry F. Byrd (D) Resigned November 10, 1965 Harry F. Byrd, Jr. (D) November 12, 1965
Michigan (2) Patrick V. McNamara (D) Died April 30, 1966 Robert P. Griffin (R) May 11, 1966
Virginia (2) A. Willis Robertson (D) Resigned December 30, 1966 William B. Spong, Jr. (D) December 31, 1966
table_1847180_3
SELECT State (class) FROM table WHERE Date of successors formal installation = May 11, 1966
May 11, 1966