In the case of the House, the FBI declined to surrender its files, and the agent it sent to testify about them declined to reveal their contents. This led to a dramatic service of a subpoena by the chairman of the House Oversight and Government Reform Committee on that FBI agent while he was testifying — all captured on live nationally broadcast television.
Now the FBI, which usually serves subpoenas and executes search warrants, is left with the alternative of complying with this unwanted subpoena by producing its entire file or arguing to a federal judge why it should not be compelled to do so.
On the Senate side, matters are even more out of hand. There, in response to a request from the Senate Judiciary Committee, the FBI sent both classified and unclassified materials to the Senate safe room. The Senate safe room is a secure location that is available only to senators and their senior staff, all of whom must surrender their mobile devices and writing materials and swear in writing not to reveal whatever they see while in the room before they are permitted to enter.
According to Sen. Chuck Grassley, chairman of the Senate Judiciary Committee, the FBI violated federal law by commingling classified and unclassified materials in the safe room, thereby making it unlawful for senators to discuss publicly the unclassified material.