You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.

Category: PRESIDENTS 
Clue: 2 of the 3 successive presidents who were Republicans, born in Ohio & generals in the Union army
ulysses s. grant, rutherford b. hayes & james a. garfield

Category: THE SENATE 
Clue: The 2 astronauts who went on to become U.S. Senators
john glenn

Category: EUROPEAN LANGUAGES 
Clue: In this language spoken by 120 million worldwide, all of the days of the week but one end with the same 3 letters

german