According to information at the link:
The FBI conducted a counterintelligence investigation into Donald Trump’s campaign based on hearsay from Australian diplomat Alexander Downer (who helped to arrange a $25 million Australian government donation to the Clinton Foundation, and who was allegedly prompted to get that hearsay by Brennan's CIA), and on the opposition research dossier prepared in part by foreign nationals on behalf of the Clinton Campaign & DNC.
How did the FBI get the DNC/HRC opposition research so they could use it to generate warrants to surveil the Trump Campaign? Turns out that HRC/DNC hired Fusion GPS, which had hired Steele (foreign agent), and which also employed Nellie Ohr, wife of DOJ Asst. Deputy AG Bruce Ohr. Nellie Ohr fed the foreign opposition research to her husband, who in turn fed it to Andrew McCabe, who in turn fed it to the FISA Court. Already working for the Clinton campaign, Steele began also working for the FBI directly as a confidential informant. When he was fired in Nov. 2016 for leaking to the press, his information continued to be provided to the FBI via Nellie and Bruce Ohr in at least 12 separate meetings with FBI agents, providing at least 2 oppo research files. "In other words, Ohr transitioned from being a DOJ supervisor to a backdoor source for the FBI to receive information from a terminated source [& DNC operative]. ... So, Bruce Ohr became a conduit of information not only for intelligence from Clinton’s British opposition-researcher but also from his wife’s curation of evidence from a Clinton foreign ally and Manafort enemy inside Ukraine [more about that at the link]. Talk about foreign influence in a U.S. election!" Interestingly, Ohr's bonus doubled during this time.
I guess we have to decide if we are ok with one campaign (the Hillary campaign) colluding with foreign nationals to undermine a U.S. election, and directly using US government agencies to undermine an opposing campaign, and to create an insurance policy to undermine/remove an elected president.
It seems like everyone would be unanimous against this, and yet, some here will defend this...or they will attack it as fake news. Maybe it is. We shall see. I will enjoy watching to see if the swamp will be drained. But, many political minded people do not want the swamp drained.
Link: Article: New evidence shows why Steele, the Ohrs & TSA workers never should have become DOJ sources