What effect did the Supreme Court case Nixon vs UNITED States have on Executive privilege?

The Supreme Court case Nixon v. United States (1974) affirmed that the President is not above the law and clarified the limits of executive privilege. The Court ruled that President Nixon had to comply with a subpoena to produce tape recordings and documents related to the Watergate scandal, stating that executive privilege cannot be used to withhold evidence in a criminal trial. This decision reinforced the principle that the judiciary has the authority to review the actions of the executive branch, thereby limiting the scope of executive privilege.