A) Congress, not the U.S. Supreme Court, is the only branch that can check the power of the executive branch. INCORRECT This statement is false because the Constitution establishes a system of checks and balances where each branch can limit the others. The Supreme Court exercises judicial review, which allows it to declare executive actions unconstitutional, as it did in United States v. Nixon. Congress has its own checks, such as impeachment and the power of the purse, but it is not the only branch that can check the executive. The Court's decision in Nixon demonstrated that the judiciary can compel the President to comply with legal orders, making this option incorrect.
B) The President had to comply with a judicial subpoena because executive privilege is not absolute. CORRECT This is the correct holding of United States v. Nixon. The Supreme Court ruled that while the President has a legitimate claim to executive privilege, that privilege must yield to the needs of the judicial process in a criminal case. The Court found that the tapes were essential to the trial and that the President's generalized interest in confidentiality did not outweigh the specific need for the evidence. This decision affirmed the principle that the President is subject to the rule of law and that the judiciary has the authority to enforce subpoenas against the executive branch.
C) The President did not have to turn over White House tapes because of his executive privilege. INCORRECT This option is the opposite of what the Court decided. The Court rejected President Nixon's claim of absolute executive privilege and ordered him to surrender the tapes. The ruling was a defeat for Nixon, as it removed his legal basis for withholding the evidence. The tapes ultimately contained damaging information that led to his resignation. Therefore, this option is factually incorrect and does not reflect the Supreme Court's decision.
D) Congress, not the U.S. Supreme Court, has the final say on interpreting executive privilege. INCORRECT This statement is incorrect because the Supreme Court is the final arbiter of constitutional questions, including the scope of executive privilege. In United States v. Nixon, the Court asserted its authority to interpret the Constitution and determine the limits of executive privilege. While Congress may have its own views, it is the judiciary that has the ultimate power to interpret the law and the Constitution. This option misrepresents the separation of powers and the role of the Supreme Court in resolving disputes between the branches.