TASK DEFINITION: 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.
PROBLEM: Category: JACKs 
Clue: Explaining why he lost the heavyweight championship to Gene Tunney, he said, "I forgot to duck"

SOLUTION: jack dempsey

PROBLEM: Category: SUPREMES 
Clue: He was supreme commander of Allied forces in Europe, & later of NATO forces

SOLUTION: dwight d. eisenhower

PROBLEM: Category: PRESIDENTIAL NICKNAMES 
Clue: "Butcher from Galena"

SOLUTION:
grant