In United States v. Nixon, the Supreme Court’s ruling made it clear that

The Court ruled that President Nixon had to turn over the Watergate tapes, rejecting his claim that executive privilege made them immune from a court subpoena. The decision showed that the president is not above the law, even while serving as head of the executive branch. Therefore, choice A is correct; the case did not decide when impeachment is desirable or how Congress must approve it.

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