United States v. Nixon, 418 U.S. 683 (1974), was a landmark United States Supreme Court case that resulted in a unanimous decision against President Richard Nixon, ordering him to deliver tape recordings and other subpoenaed materials to a federal district court. Issued on July 24, 1974, the decision was important to the late stages of the Watergate scandal, when there was an ongoing impeachment process against Richard Nixon. United States v. Nixon is considered a crucial precedent limiting the power of any U.S. president to claim executive privilege.
I doubt the answers were Magna Carta or Confirmation of Charters, both released during the 1200s and the CoC an extension of the Magna Carta, since these existed before the parliamentary system existed (Feudalism took prime in Europe in these times). The Mayflower Compact was the first framework of the government of the colonial USA, so the answer is the west minister model, also known as the Westminster system.
