Sen. Lindsey Graham (R-SC) informed the secret surveillance court that the Bureau did not disclose the fact that it has investigated a primary source for the Steele dossier as a Russian agent.

Graham published the memo he sent to the court, indicating that Igor Danchenko was being investigated by the FBI beginning in 2009. The document also pointed out that the Bureau’s Crossfire Hurricane team, which was tasked with looking into Russia’s interference in the 2016 election, already knew about the prior investigation of Danchenko but neglected to disclose it in the application to spy on former Trump campaign staffer Carter Page.

Former British spy Christopher Steele, who compiled a dossier full of damaging information about then-candidate Donald Trump, used Danchenko as his primary source for the document, which has by now been almost entirely discredited. The Daily Caller reported that the Senator “formally notified James Boasberg, the judge presiding over the Foreign Intelligence Surveillance Court (FISC) about the information in a letter on Thursday.”

In the memo, Graham wrote, “This letter, and the attached summary, details what appear to be further failures on the part of the FBI to fully inform the court of all of the facts related to the probable cause determination for the Carter Page FISA applications.”