Which of these book titles best describes the United States v. Nixon case and its significance?

Not Above the Law – Nixon's illegal actions resulted in a Supreme Court ruling requiring sharing of the private tapes.
Stealing the Presidency – The Supreme Court ruled President Nixon must appear in court, but he resigned from his office before the hearings began.
Executive Privileges – Nixon proved that a president has the right to keep communications with advisors private.
The People Speak – The Supreme Court ruled that conversations could remain private, but Nixon was impeached anyway.