Chief Justice Burger, writing for the majority in US v. Nixon noted: "Whatever the nature of the privilege of confidentiality of Presidential communications in the exercise of Art. II powers, the privilege can be said to derive from the supremacy of each branch within its own assigned area of constitutional duties. Certain powers and privileges flow from the nature of enumerated powers; the protection of the confidentiality of Presidential communications has similar constitutional underpinnings. United States v. Nixon (頁面存檔備份,存於互聯網檔案館), 418 U.S. 683 (1974) (Supreme Court opinion at FindLaw)