https://theconservativetreehouse.com/2018/01/11/the-doj-and-fbi-worked-with-fusion-gps-on-operation-trump/#more-144446 It appears Fusion GPS was probably using illegal FISA queries to spy on the Trump campaign (primarily Manafort then) until being stopped by NSA head Admiral Rogers conducting a compliance review and stopping access on 4/18/16 and then reporting to the FISA Court the violations after a full audit was conducted. Also Steele was hired right after the FISA access was shut down and Fusion GPS's Simpson's wife had a meeting at the White House the next day after access was shut off. The FBI themselves did the illegal spying after that point. I would put the chance at 99% myself that Fusion GPS is the private contractor. Someone really high up orchestrated the actions to take after 4/18/16 to spy on Trump and come up with that trash dossier. This is big enough for some low level people to flip on the big ones since Obama isn't there to pardon anyone.