On je tri godine radio u Vijetnamu, a 1966. se pridružio osoblju predsjednika Lyndona Johnsona u Bijeloj kući, postavši mlađi član delegacije na mirovnim pregovorima u Parizu.
He worked for three years in Vietnam and joined President Lyndon Johnson's White House staff in 1966, becoming a junior member of the delegation at the Paris peace talks.