Conversation so far:
Where is Scooter Libby from?
Scooter Libby was born to an affluent Jewish family in New Haven, Connecticut.
Where did Scooter Libby grow up?
Scooter Libby's family lived in the Washington region, Miami, and Connecticut prior to Libby's graduation from Phillips Academy, in Andover, Massachusetts, in 1968.
Did Scooter Libby attend college?
Scooter Libby matriculated at Yale University in New Haven, Connecticut, in Fall 1968, graduating magna cum laude in 1972.
Where did Scooter Libby attend college?
Scooter Libby matriculated at Yale University in New Haven, Connecticut, in Fall 1968, graduating magna cum laude in 1972.

Question: what did he study?
Self-contained rewrite: What did Scooter Libby study?