Trump’s legal team “made the mistake of using a word that they have not used before,” said “The Last Word” anchor.

“In describing Donald Trump’s relationship to these documents, after saying in their Supreme Court appeal tonight, once again, that this case is, ‘essentially a document storage dispute,’ the Trump lawyers, on page 30, went on to say ‘the Government has sought to criminalize President Trump’s possession and management of his own personal and presidential records,’” O’Donnell explained.

“Possession of those records is a crime,” he added.

Trump’s lawyers had until now appeared to have avoided the term, said O’Donnell.

“Everywhere else in their filing they refer to a former president’s legal right to access to their presidential records and that is true ― the law requires that those records be in the government’s possession while former presidents have access to them,” O’Donnell continued.

“In every filing the Trump lawyers have made in this case, they have been trying to suggest that possession of the documents by the former president is perfectly legal without ever using the word possession,” he added. “But tonight, they did.”