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: THE 1970s 
Clue: G. Gordon Liddy, E. Howard Hunt & Egil Krogh were nicknamed this because they "plugged leaks"

SOLUTION: plumbers

PROBLEM: Category: U.S. PRESIDENTS 
Clue: Washington was the one who added these 4 words to the presidential oath; they're not in the Constitution

SOLUTION: \"so help me god\"

PROBLEM: Category: FAMOUS PAIRS 
Clue: Now meaning nearly identical, these 2 names were applied to rivals Handel & Bononcini in a 1720s British verse

SOLUTION:
tweedledum & tweedledee