The US Justice Department is under pressure to provide a more detailed explanation of the FBI's search of Donald Trump's Florida resort.
Unusual raid on a former US president’s residence provoked screams of anger from Republicans.
The Justice Department and FBI had not to comment on the Mar-a-Lago search as of Tuesday night.
A "big number" of federal agents conducted a search the day before, according to Trump.
A federal judge must approve FBI searches.
Trump's close associates revealed that the investigation concerned the handling of presidential records and confidential materials discovered at Mar-a-Lago after he departed the White House.
FBI departed with fresh information found during the search.
The probe into Trump's possession of sensitive information in boxes.
Trump's attorney Christina Bobb was present for the raid.