"Nexus to an official proceeding. ...If the President were focused solely on a press strategy in seeking to have McGahn refute the New York Times article, a nexus to a proceeding or to further investigative interviews would not be shown. But the President's efforts to have McGahn write a letter "for our records" approximately ten days after the stories had come out—well past the typical time to issue a correction for a news story—indicates the President was not focused solely on a press strategy, but instead likely contemplated the ongoing investigation and any proceedings arising from it."
January 1, 1970
https://en.wikiquote.org/wiki/Mueller_Report