(CNN) Senate Judiciary Chairman Lindsey Graham is pushing the Justice Department to declassify still-secret parts of the Foreign Intelligence Surveillance Act warrants on Carter Page and other documents related to the Justice Department inspector general's ongoing investigation into FBI surveillance efforts in 2016 and 2017.

Graham wrote a letter to Attorney General William Barr, released Tuesday, urging him to use the declassification powers he was granted by President Donald Trump to declassify material surrounding Inspector General Michael Horowitz's investigation into the Page FISA process. His letter comes after the Justice Department said Friday that the declassification has not yet been ordered, and a private lawyer seeking the classified information learned the executive branch was considering it.

Graham wrote that Horowitz's investigation is "nearing completion," according to Horowitz, and he listed nine classified documents he said should be released based on his review. Those include the Page FISA materials, any transcripts or summaries of George Papadopoulos' conversations with confidential informants and "the chart that shows the FBI's attempts to verify the allegations in the Steele dossier," a reference to the opposition research document compiled by former British intelligence agent Christopher Steele.

"In order for the Inspector General to be able to present the most complete results of his investigation to Congress and the American people, certain documents will need to be declassified and released to the public," Graham wrote.

Graham's letter follows the Justice Department telling a federal judge Friday night that neither Trump nor Barr has ordered the declassification of the Page FISA warrants -- despite White House statements that Trump wanted them made public, and another executive branch discussion Friday that may have led to declassification.

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