The chairman of the House Oversight committee asked the FBI on Thursday to turn over more documents about former FBI Director James Comey's interactions with the White House and Justice Department, including materials dating back almost four years to the Obama administration. "We will update this response as soon as possible".
In a responding letter, Chaffetz said he still wanted any related documents that would be outside the scope of the special counsel's investigation, and a list of documents found to be within the scope of the probe, by June 8.
"In fact, the Committee's investigation will complement the work of the Special Counsel".
"In this case, the focus of the Committee's investigation is the independence of the FBI, including conversations between the President and Comey and the process by which Comey was removed from his role as director", he continued.More news: Lawmakers react to new health care budget score
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"The FBI is withholding those documents, citing to the appointment of Robert Mueller as Special Prosecutor", Chaffetz stated in the letter.
In a letter to McCabe, Chaffetz said he is seeking to review Comey's memos and other written materials so he can "better understand" Comey's communications with the White House and attorney general's office.
Chaffetz's panel is one of several in Congress investigating alleged efforts by Russian Federation to tip the election to Trump, and the possibility that Trump associates had coordinated with Moscow.
Chaffetz further requests that the FBI identify all responsive documents, regardless of whether the document is within the scope of the special counsel's investigation.