| U.S. historian George F. ___ | 28 |
| U.S. historian ___ Marshall | 27 |
| U.S. historian: 1840-1914 | 25 |
| U.S. humane org. since 1866 | 27 |
| U.S. humorist and family | 24 |
| U.S. humorist: 1850–96 | 29 |
| U.S. immigrant's class | 26 |
| U.S. immigrant's subj. | 26 |
| U.S. immigrants' subj. | 26 |
| U.S. industrialist: 1883-1979 | 29 |
| U.S. inst., New London, Conn. | 29 |
| U.S. intelligence org. | 22 |
| U.S. invasion site of 1983 | 26 |
| U.S. inventor Elisha ___ | 24 |
| U.S. inventor Pliny ___ | 23 |
| U.S. investment instrument | 26 |
| U.S. island in the Pacific | 26 |
| U.S. island near U.S.S.R. | 25 |
| U.S. island of entry, once | 26 |
| U.S. jurist: 1856–1941 | 29 |
| U.S. labor leader Eugene | 24 |
| U.S. landscape painter | 22 |
| U.S. legal-defense group | 24 |
| U.S. maritime spy agcy. | 23 |
| U.S. medical research agcy. | 27 |
| U.S. medicine regulator | 23 |
| U.S. military decoration | 24 |
| U.S. Mint bullion coin | 22 |
| U.S. mo. without a holiday | 26 |
| U.S. mortgage guarantor | 23 |
| U.S. motorists' club | 24 |
| U.S. naturalist and writer | 26 |
| U.S. naturalist: 1838-1914 | 26 |
| U.S. Naval Academy freshman | 27 |
| U.S. naval base in Spain | 24 |
| U.S. naval base until 1951 | 26 |
| U.S. naval force in Japan | 25 |
| U.S. Navy submarine builder | 27 |
| U.S. newcomer's course | 26 |
| U.S. novelist: 1815–82 | 29 |
| U.S. offering to investors | 26 |
| U.S. Olympic champion, 1956 | 27 |
| U.S. Olympic diver Louganis | 27 |
| U.S. Olympic gymnast Chow | 25 |
| U.S. Open champ Tony: 1936 | 26 |
| U.S. Open champ, 1985-87 | 24 |
| U.S. Open champ, Arthur | 23 |
| U.S. Open champion: 1968 | 24 |
| U.S. Open golf champ: 1927 | 26 |
| U.S. Open golf champ: 1959 | 26 |
| U.S. Open golf champ: 1988-89 | 29 |
| U.S. Open golf champion Ernie | 29 |
| U.S. Open judge's shout | 27 |
| U.S. Open park, for short | 25 |
| U.S. Open players, usually | 26 |
| U.S. Open singles champ: 1972 | 29 |
| U.S. Open stadium name | 22 |
| U.S. Open tennis champ: 1963 | 28 |
| U.S. Open tennis champ: 1966 | 28 |
| U.S. Open tennis champ: 1968 | 28 |
| U.S. Open tennis stadium | 24 |
| U.S. Open winner in 1997 | 24 |
| U.S. Open winner: 1934 | 22 |
| U.S. Open winner: 1961 | 22 |
| U.S. Open winner: 1976 | 22 |
| U.S. Open winner: 1977 | 22 |
| U.S. Open's ___ Stadium | 27 |
| U.S. or British mil. award | 26 |
| U.S. orator and family | 22 |
| U.S. org. for minor traders | 27 |
| U.S. overseas radio agcy. | 25 |
| U.S. Pacific territory | 22 |
| U.S. painter and family | 23 |
| U.S. painter Rembrandt | 22 |
| U.S. painter: 1871-1951 | 23 |
| U.S. Park Service employee | 26 |
| U.S. patriotic display | 22 |
| U.S. pharmaceuticals overseer | 29 |
| U.S. philosopher-essayist | 25 |
| U.S. physicist Alfred ___ | 25 |
| U.S. pianist of 1800's | 26 |
| U.S. playwright Augustin | 24 |
| U.S. playwright's family | 28 |
| U.S. playwright: 1904-61 | 24 |
| U.S. poet and baseball fan | 26 |
| U.S. poet laureate _____ Dove | 29 |
| U.S. poet, ___ Lazarus | 22 |
| U.S. poet: 1898–1943 | 27 |
| U.S. poet: 1899–1932 | 27 |
| U.S. pollution controller | 25 |
| U.S. port of entry in Tex. | 26 |
| U.S. port, or its locale | 24 |
| U.S. portrayer of flappers | 26 |
| U.S. possession since 1898 | 26 |
| U.S. Pres., militarily | 22 |
| U.S. president after Grant | 26 |
| U.S. President William Howard | 29 |
| U.S. president's command | 28 |
| U.S. president's title | 26 |
| U.S. president, 1861 to 1865 | 28 |