The Biden administration has asked for a delay in handing over Prince Harry’s visa documents. The Department of Homeland Security (DHS) has said it needs an extra two weeks to find the Duke of Sussex’s immigration records, before a federal judge decides whether or not they should be made public. The department made its request in a court filing on Sunday, saying it needed more time to respond to Judge Carl Nichols’s order to provide more information about why Harry’s immigration details should be kept secret. The Heritage Foundation, a conservative think tank, wants the documents to be made pu…