In the United States v. Nixon case, the Supreme Court ordered Nixon to deliver the unedited tape recordings and documents related to the Watergate Scandal, an event in which he was involved. However, the President refused to do so, claiming his "Executive Privilege", that is to say, his right as President to withhold information from other government branches to preserve confidential communications within the executive branch or to secure the national interest.
Nevertheless, the Court stated that the executive privilege had limits and it wasn't immune from judicial review, regarding the demands of due process of law, and he ought to show the evidence.
This ruling made it clear that the executive branch should not have more power than other branches of government.
