Senate Judiciary Committee Chairman Lindsey Graham is resuming an investigation of potential surveillance abuse by the FBI with an expansive request for records related to the bureau’s vetting of the Steele dossier.

In a letter sent Thursday to Attorney General William Barr, Graham asked for all FBI and Justice Department documents related to investigators’ attempts to verify allegations made in the dossier, which was authored by former British spy Christopher Steele and funded by Democrats.

The FBI relied heavily on Steele’s report to obtain four Foreign Intelligence Surveillance Act (FISA) warrants against former Trump campaign adviser Carter Page.

Republicans investigated whether the FBI misled the FISA court by relying on the dossier even though its allegations about Page were unverified. They also asserted the FBI failed to tell surveillance court judges that Steele was working on behalf of the DNC and Clinton campaign on an investigation of Donald Trump. (RELATED: DOJ Releases Carter Page FISA Applications)

Graham also indicated in the letter that he is investigating the FBI’s decision to open up investigations of Trump campaign associates in 2016.

He said the Judiciary Committee is concerned vetting proper vetting procedures and the full presentation of facts to the FISA Court “may not have occurred with regard to the applications for FISA warrants for (and the opening of the underlying investigation on) Carter Page and other individuals associated with the presidential campaign of Donald Trump.”

The FBI formally opened counterintelligence investigations on four campaign associates on July 31, 2016. The first FISA against Page was granted Oct. 21, 2016.

Graham is seeking all documents provided to the Gang of Eight in May 2018 regarding the Russia probe. He is also requesting the so-called “Woods file,” which would include any materials used to verify the allegations against Page included in FISA applications.

The dossier alleges Page served as the Trump campaign’s backchannel to the Kremlin. He is also accused of coming up with the idea of providing stolen DNC emails to WikiLeaks and of meeting with two Kremlin insiders during a trip to Moscow in July 2016.

Page has vehemently denied the allegations. He has testified to special counsel Robert Mueller’s grand jury, but has not been charged in the investigation.

The dossier suffered a heavy blow last Wednesday when Michael Cohen, the former Trump attorney, undercut one of Steele’s main collusion allegations. Cohen denied under oathever visiting Prague, where Steele alleges Cohen met with Russian hackers in August 2016.

Graham also wants all documents with the FISA Court “relating to any FISA applications associated with Carter Page or other individuals on or associated with Donald Trump’s 2016 presidential campaign.”

Page is the only former Trump aide known to have been targeted with FISA warrants.

It remains to be seen how Barr will handle the document requests. Republicans battled throughout 2017 and 2018 with Deputy Attorney General Rod Rosenstein, who had final say on document production because he oversaw the special counsel’s investigation.

Republicans accused Rosenstein of slow-rolling or ignoring document requests. Rosenstein is leaving the Justice Department in March.

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