Donald Trump, the former president, said in a court document filed on Wednesday that because the 15 boxes he turned over from Mar-a-Lago in January contained presidential materials, the National Archives should have anticipated finding classified material among them. In the document, which served as his final written legal defense before a crucial hearing on Thursday, he acknowledged that the Trump Mar A Lago documents had been discovered to contain classified material, but he argued that this should not have been caused for alarm and should not have prompted the search of Trump's Florida home earlier this month.