congress had subpoenaed... and which the FBI stonewalled in providing, finally "compromising" and letting Nunes and a few others come over and look at those documents, but would still not turn them over.
Nunes' wrote down some of the shocking details of what he learned from those documents in his 4 page memo.
Congress pays to fund the FBI, and has oversight of them:
https://www.fbi.gov/about/faqs/who-monitors-or-oversees-the-fbi
The FBI’s activities are closely and regularly scrutinized by a variety of entities. Congress—through several oversight committees in the Senate and House—reviews the FBI’s budget appropriations, programs, and selected investigations. The results of FBI investigations are often reviewed by the judicial system during court proceedings. Within the U.S. Department of Justice, the FBI is responsible to the attorney general, and it reports its findings to U.S. Attorneys across the country. The FBI’s intelligence activities are overseen by the Director of National Intelligence.
Edited by JeffB at 11:20:21 on 01/23/18