It's hard to understand how some of the classified documents ended up at Mar-a-Lago, according to a former chief of staff to President Donald Trump.

The materials that were seized during the August 8 raid on Trump's Florida residence were discussed by Mick Mulvaney on CNN Friday. The FBI recovered 11 sets of documents.

Among the recovered materials were items labeled Top Secret Sensitive Compartmented Information, orTS/SCI, which requires the highest levels of security clearance, which caught Mulvaney's attention.

He said that that's not supposed to be there.

It's difficult to comprehend how it gets there. Mulvaney said that these things are not accidentally moved. There are marks on these documents. There's supposed to be people who are tracking where they are for them.

Trump has denied any wrongdoing and said he had a "standing order" to declassify all documents removed from the Oval Office and taken to his home.

During the last few days of Trump's term, he dealt with his impending second impeachment, the aftermath of the Capitol riot, and his attempts to challenge the 2020 election.

If the material is declassified or destroyed, the brightly colored cover sheets of the documents are hard to miss.

Mulvaney wasn't sure if it was enough to justify a search warrant for the Mar-a-Lago site.

Mulvaney said a search warrant is only justified if it is an emergency.

If the evidence is going to disappear or someone is going to see it, he said. There is an urgent need for a search warrant that is above a subpoena.

Last week, Mulvaney said that he hopes Trump doesn't run for president in 2024, as he thinks Trump is the only Republican who can lose to a Democrat.