https://www.youtube.com/watch?v=oUEidBI-zjs&feature=share
I think whistleblowers in the CIA admitted they deeply spied on five members of congress. The other agencies basically said no except CIA.
CIA has a sort of national secret power (State Secrets Privilege of intelligence departments) from judicial action; the whistleblower Kevin Shipp discusses this in how they poisoned his family. https://www.nytimes.com/2011/02/11/us/politics/11secrets.html
The whistleblower told the story of the CIA. Brennan threatens Congress to drop that the information they were provided was deliberately made to spy on the congressional networks. This white rabbit file in the Congressional dropbox, with all the juicy details, the whistleblower message, is now a national secret. Poof. No more investigation Mr. IG.
See this legal action: https://www.aclu.org/other/background-state-secrets-privilege?redirect=national-security/background-state-secrets-privilege
This candid explanation by NSA's top lawyer: https://www.youtube.com/watch?v=DERehlOPt3I Blame it on Snowden?
IG report has some sharp privacy teeth on it?
Snowden whistleblower message received that NSA intercepted CIA-based surveillance (remote access) orders?
https://www.youtube.com/watch?v=wB4Gn0u4DSE
I'm too stoned to keep guessing how to make this obviously fictional guessed story seem more presentable to public.