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 consistency, answers should be in all lower cased letters.

Category: NAME THAT CENTURY 
Clue: President McKinley is assassinated
the 20th century

Category: THE U.S. CONGRESS 
Clue: Frustrated with his own political party, in 2001 this senator from Vermont switched to indepedent
jeffords

Category: 11-LETTER WORDS 
Clue: To back up or confirm another person's version of events

corroborate