A top Senate Republican said a newly declassified FBI document on the bureau’s 2018 briefing of the Senate Intelligence Committee shows the FBI misled Congress about the reliability of British ex-spy Christopher Steele’s anti-Trump dossier.

Sen. Lindsey Graham, the chairman of the Senate Judiciary Committee, revealed that the document had been declassified during an interview with Fox Business anchor Maria Bartiromo on Fox News’s Sunday Morning Futures, arguing that “somebody needs to go to jail” for the FBI misleading the Senate Intelligence Committee about the dossier a year after Steele’s primary subsource, recently revealed to be Igor Danchenko, met with the FBI and disputed the reliability of the research. Danchenko, a 42-year-old Russian-trained lawyer, was identified as Steele’s primary subsource after Graham released declassified documents in July related to a three-day interview with Danchenko in January 2017 where he contradicted claims made in the dossier and undercut the FBI’s case against onetime Trump campaign associate Carter Page.