The heavily redacted 412-page document includes the agency's initial October 2016 Foreign Intelligence Surveillance Act (FISA) warrant application to surveil Page, along with three renewal applications filed in January, April, and June of 2017.
While the documents were heavily redacted in places, the Times reported that visible portions of the documents show the Federal Bureau of Investigation telling the intelligence court that Page "has been collaborating and conspiring with the Russian government".
It added that "Page has established relationships with Russian Government officials, including Russian intelligence officers". The documents, meanwhile, remained out of public view.
That section cites information from "Source #1" who alleged that during a trip to Moscow in July 2016, Page met secretly with two sanctioned Kremlin insiders, Igor Sechin and Igor Diveykin, as part of a collusion scheme involving the Trump campaign.
On three separate occasions, officials from the Department of Justice - including Deputy Attorney General Rod Rosenstein - renewed the FISA application. Republicans who saw the full classified documents have previously alleged that surveillance of Page was improperly based on information gathered by Christopher Steele, a former British agent who gathered intelligence on alleged ties between the Trump campaign and Russians.
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The documents, 412 pages of heavily redacted material, have been at the heart of a controversy over alleged bias at the Federal Bureau of Investigation. Republicans alleged the Federal Bureau of Investigation had abused its surveillance powers and improperly obtained the warrant, a charge that Democrats rebutted as both sides characterized the documents in different ways.
The FISA applications released on Saturday, however, cite the dossier as the source for the first piece of evidence laying out the allegations against Page, The Daily Caller reported. Rep. Adam Schiff, Calif., the ranking Democrat on the House intelligence committee, said he believes the documents "affirm that our nation faced a profound counterintelligence threat prior to the 2016 election".
Of note, in the almost two years since the application was filed, Page hasn't been charged with any of the allegations contained within it.
"The GOP must cease their attacks on our law enforcement and intelligence communities, and finally decide where their loyalty lies", she said in her statement.
The name of the person who hired Mr. Steele is not disclosed in the FISA application.
Trump declassified the memo over the objections of the Federal Bureau of Investigation, which warned that the document contained "material omissions of fact that fundamentally impact the memo's accuracy", the Hill report said.