A federal appeals court has rejected a request from former US President Donald Trump to keep secret White House material related to the January 6 storm of the Capitol.

"Congress has unique important interests in the events of January 6," Judge Patricia Millett wrote of the announcement.

Millett also referred to the fact that President Joe Biden had made a carefully reasoned decision that the documents were in the public interest, and that Trump had failed to show that it would do any harm to the nation if the documents were released.

Documents on 770 pages

Donald Trump now has two weeks to turn to the Supreme Court - otherwise the documents will now be handed over to the congressional committee that is investigating the events of January 6.

These are documents on a total of 770 pages that Donald Trump wants to keep secret.

These include notes from Trump's closest associates, memoranda to the White House press secretary and drafts of the then president's speech on January 6 - a speech that many consider to be the decisive spark that triggered Trump supporters' storming of Congress.