Watergate Scandal: A major political scandal in the 1970s involving the Nixon administration's illegal activities, including the break-in at the Democratic National Committee headquarters at the Watergate office complex.
Executive Privilege: The right of the president and high-level executive branch officials to withhold information from Congress, the courts, and the public in order to preserve confidential communications.
Imperial Presidency: The concept that the power of the American presidency has grown enormously since the mid-20th century, to the point that the president now dominates the other branches of government.