List of people who have served in all three branches of the United States federal government

Columns: Person | Executive branch service | Legislative branch service | Judicial branch service
James L. Buckley | Undersecretary of State for Security Assistance , 1981-1982 President of Radio Free Europe/Radio Liberty , 1982-1985 | Senator , New York , 1971-1977 | U.S . Circuit Judge , U.S. Court of Appeals for the D.C . Circuit , 1985-1996 | James F. Byrnes | Director , Office of Economic Stabilization , 1942-1943 Chairman , Office of War Mobilization , 1943-1945 Secretary of State , 1945-1947 | Representative , South Carolina , 1911-1925 Senator , South Carolina , 1931-1941 | Associate Justice of the Supreme Court of the United States , 1941-1942 | Salmon P. Chase | Secretary of the Treasury , 1861-1864 | Senator , Ohio , 1849-1855 ; 1861 | Chief Justice of the United States , 1864-1873 | Henry De Lamar Clayton , Jr | United States Attorney , Middle District of Alabama , 1893-1896 | Representative , Alabama , 1897-1914 | U.S. District Judge , U.S. District Court for the Northern District of Alabama and U.S. District Court for the Middle District of Alabama , 1914-1929 | Nathan Clifford | Attorney General , 1846-1848 Minister to Mexico , 1848-1849 | Representative , Maine , 1839-1843 | Associate Justice of the Supreme Court of the United States , 1858-1881 | Alfred Conkling | Minister to Mexico , 1852-1853 | Representative , New York , 1821-1823 | U.S. District Judge , U.S. District Court for the Northern District of New York , 1825-1852 | J. Harry Covington | Member , Railway Wage Commission , 1918-1920 | Representative , Maryland , 1909-1914 | U.S. District Judge , Supreme Court of the District of Columbia , 1914-1918

Example questions:
When was the executive service branch created that was held by the seventh governor of the most densely populated state , who served in all 3 US branches ? | What President held office when the member who served all 3 branches of government from the state whose capitol is Charleston served as Secretary of the Navy ? | Which member from the Bluegrass State served in all 3 branches of government , including one that falls within the Department of the Treasury ?

Answers:
1798 | Rutherford B. Hayes | Walter Evans