§ 3, cl. 7. Impeachment is also a drastic and rarely invoked remedy, and Congress is not restricted to relying only on impeachment, rather than making criminal law applicable to a former President, as OLC has recognized. A Sitting President’s Amenability to Indictment and Criminal Prosecution, 24 Op. O.L.C. at 255 (“Recognizing an immunity from prosecution for a sitting President would not preclude such prosecution once the President’s term is over or he is otherwise removed from office by resignation or impeachment.”). 1092 Similar institutional safeguards protect Department of Justice officers and line prosecutors against unfounded investigations into prosecutorial acts. Prosecutors are generally barred from participating in matters implicating their personal interests, see 28 C.F.R. § 45.2, and are instructed not to be influenced by their “own professional or personal circumstances,” Justice Manual § 9-27.260, so prosecutors would not frequently be in a position to take action that could be perceived as corrupt and personally motivated. And if such cases arise, criminal investigation would be conducted by responsible officials at the Department of Justice, who can be presumed to refrain from pursuing an investigation absent a credible factual basis. Those facts distinguish the criminal context from the common-law rule of prosecutorial immunity, which protects against the threat of suit by “a defendant [who] often will transform his resentment at being prosecuted into the ascription of improper and malicious actions.” Imbler v. Pachtman, 424 U.S. 409, 425 (1976). As the Supreme Court has noted, the existence of civil immunity does not justify criminal immunity. See O’Shea v. Littleton, 414 U.S. 488, 503 (1974) (“Whatever may be the case with respect to civil liability generally, . . . we have never held that the performance of the duties of judicial, legislative, or executive officers, requires or contemplates the immunization of otherwise criminal deprivation of constitutional rights.”) (citations omitted).