Under the Presidential Records Act, the White House must preserve all memos, letters, emails and papers that the president touches, sending them to the National Archives for safekeeping as historical records.

But White House aides realized early on that they were unable to stop Trump from ripping up paper after he was done with it and throwing it in the trash or on the floor, according to people familiar with the practice. Instead, they chose to clean it up for him, in order to make sure that the president wasn’t violating the law.

Staffers had the fragments of paper collected from the Oval Office as well as the private residence and send it over to records management across the street from the White House for Larkey and his colleagues to re-assemble.