Steele Dossier sub-source was subject of FBI counterintelligence probe

A sub-source used to compile the so-called Steele Dossier, a controversial opposition research document against then-candidate Donald Trump, was previously the subject of an FBI counterintelligence investigation, Attorney General William Barr disclosed in a letter released on Thursday.

The detail was previously redacted from a footnote in Justice Department inspector general Michael Horowitz's 2019 report on four Foreign Intelligence Surveillance Act (FISA) court warrant applications.

But U.S. Attorney John Durham, tapped by Barr to review the origins of the FBI's Russia probe, signed off on Barr releasing the detail to Senate Judiciary Committee Chairman Lindsey Graham (R-S.C.), who is doing his own investigation into the FBI's probe into Russia's 2016 election meddling and the Trump campaign.