correspondingly be a limited one. A preclusion of “corrupt” official action is not a major intrusion on Article II powers. For example, the proper supervision of criminal law does not demand freedom for the President to act with the intention of shielding himself from criminal punishment, avoiding financial liability, or preventing personal embarrassment. To the contrary, a statute that prohibits official action undertaken for such personal purposes furthers, rather than hinders, the impartial and evenhanded administration of the law. And the Constitution does not mandate that the President have unfettered authority to direct investigations or prosecutions, with no limits whatsoever, in order to carry out his Article II functions. See Heckler v. Chaney, 470 U.S. 821, 833 (1985) (“Congress may limit an agency’s exercise of enforcement power if it wishes, either by setting substantive priorities, or by otherwise circumscribing an agency’s power to discriminate among issues or cases it will pursue.”); United States v. Nixon, 418 U.S. at 707 (“[t]o read the Art. II powers of the President as providing an absolute privilege [to withhold confidential communications from a criminal trial] . . . would upset the constitutional balance of ‘a workable government’ and gravely impair the role of the courts under Art. III”). Nor must the President have unfettered authority to remove all Executive Branch officials involved in the execution of the laws. The Constitution establishes that Congress has legislative authority to structure the Executive Branch by authorizing Congress to create executive departments and officer positions and to specify how inferior officers are appointed. E.g., U.S. CONST., ART. I, § 8, cl. 18 (Necessary and Proper Clause); ART. II, § 2, cl. 1 (Opinions Clause); ART. II, § 2, cl. 2 (Appointments Clause); see Free Enterprise Fund, 561 U.S. at 499. While the President’s removal power is an important means of ensuring that officers faithfully execute the law, Congress has a recognized authority to place certain limits on removal. Id. at 493-495. The President’s removal powers are at their zenith with respect to principal officers—that is, officers who must be appointed by the President and who report to him directly. See Free Enterprise Fund, 561 U.S. at 493, 500. The President’s “exclusive and illimitable power of removal” of those principal officers furthers “the President’s ability to ensure that the laws are faithfully executed.” Id. at 493, 498 (internal quotation marks omitted); Myers, 272 U.S. at 627. Thus, “there are some ‘purely executive’ officials who must be removable by the President at will if he is able to accomplish his constitutional role.” Morrison, 487 U.S. at 690; Myers, 272 U.S. at 134 (the President’s “cabinet officers must do his will,” and “[t]he moment that he loses confidence in the