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: SOUTH OF THE BORDER 
Clue: Known as J.C., this boxing champion won titles in 3 weight divisions & more than 100 pro fights
julio cesar chavez

Category: THE CHIEFS 
Clue: This Chief Justice in the Dred Scott decision earlier served as Attorney General under Andrew Jackson
taney

Category: NAME THE POET 
Clue: "Tho' I've belted you an' flayed you, by the livin' gawd that made you, you're a better man than I am, Gunga Din"

rudyard kipling