WASHINGTON (AP) — The public won’t see President Donald Trump’s White House records for years, but there’s growing concern the collection won’t be complete, leaving a hole in the history of one of America’s most tumultuous presidencies.

Trump has been cavalier about the law requiring that records be preserved. He has a habit of ripping up documents before tossing them out, forcing White House records workers to spend hours taping them back together.

“They told him to stop doing it. He didn’t want to stop,” said Solomon Lartey, a former White House records analyst. He said the first document he taped back together was a letter from Sen. Chuck Schumer, D-N.Y., about a government shutdown.

The president also confiscated an interpreter’s notes after Trump had a chat with Russian leader Vladimir Putin. Trump scolded his White House counsel for taking notes at a meeting during the Russia investigation by former special counsel Robert Mueller. Top executive branch officials had to be reminded more than once not to conduct official business on private email or text messaging systems and to preserve it if they did.

And now, Trump’s baseless claim of widespread voter fraud, which postponed for weeks an acknowledgement of President-elect Joe Biden’s victory, is delaying the transfer of documents to the National Archives and Records Administration, further heightening concern about the integrity of the records.

“Historians are likely to suffer from far more holes than has been the norm,” said Richard Immerman at the Society for Historians of American Foreign Relations. In the Trump White House, “not only has record-keeping not been a priority, but we have multiple examples of it seeking to conceal or destroy that record.”

Lack of a complete record might also hinder any ongoing investigations of Trump, from his impeachment trial and other prospective federal inquiries to investigations in the state of New York.

But even with requests by lawmakers and lawsuits by government transparency groups, there is an acknowledgment that noncompliance with the Presidential Records Act carries little consequence for Trump.