A two-term senator from Massachusetts, he later replaced Maxwell Taylor as ambassador to South Vietnam, and his notes to the State Department formed the bulk of the Pentagon Papers.  
His memoir The Stream Has Many Eyes was written during his seven-year term as special envoy to the Vatican.  He won the 1964 New Hampshire Republican primary as a write-in candidate, twelve years after serving as Eisenhower's campaign manager, resulting in his appointment as representative to the United Nations.  A two-term senator from Massachusetts, he later replaced Maxwell Taylor as ambassador to South Vietnam, and his notes to the State Department formed the bulk of the Pentagon Papers.  FTP, name this man who was also Richard Nixon's running mate in 1960.
His memoir The Stream Has Many Eyes was written during his seven-year term as special envoy to the Vatican.  
Henry Cabot Lodge, Jr.