On self-pardons https://constitutioncenter.org/blog/explaining-the-presidential-self-pardon-debate

"Richard Nixon reportedly asked for an internal legal opinion about the option of a self-pardon towards the end of his presidency. The President’s lawyers said he had the power to issue a self-pardon, but Nixon declined to do so.

But just before Nixon’s resignation, the Justice Department Office of Legal Council issued its own memo on the subject, on August 5, 1974. “Under the fundamental rule that no one may be a judge in his own case, the President cannot pardon himself,” said Mary C. Lawton, Acting Assistant Attorney General."