I would call it the “core group” within the FBI, joined by certain types in Justice and the CIA. Look at their positions - Strzok as head of FBI Counterintelligence, McCabe as Deputy Director, Page as a handy FBI/Mueller lawyer, Ohr as Deputy AG at Justice, Mrs. Ohr as the Fusion AG employee with a Russian language background and a ham radio license, possibly joined by Brennan and Clapper at CIA. I could go on; these people were in sufficiently high places so that those below them would know little or nothing of what they were doing and if they suspected it, were in no position to do anything about it. It will be interesting to find out which three journalists were paid by Fusion as part of the dossier effort. And now we see, as Roger Stone predicted, the attempt to skew attention to Trump’s mental and psychological conditions - they can’t succeed with the phony dossier, which is blowing apart, so they switch to another possible coup route. We must be vigilant.
There are 13788 FBI agents yet the exact same agents and SACs worked on Clinton’s emails, the original Russia investigation and finally moving over to work with Mueller. Far to cozy.