Glenn Simpson is the underbelly of the DC swamp varmit. Opposition research (true or not) PLUS the contacts to get it placed in NYT, LAT, WaPo, ABC, CNN, etc..
Hired by politicians, “news” organizations, political parties, lobbyists, lawyers, you name it.
http://dailycaller.com/2017/11/09/russian-lawyer-took-fusion-gps-report-into-trump-tower-meeting/
...Simpson told the Senate Judiciary Committee in August that he did not know about the Trump Tower meeting until this July, when it was reported by The New York Times...
...Veselnitskaya met before and after the Trump Tower conclave with Glenn Simpson, a former Wall Street Journal reporter and founding partner of Fusion. Simpson was in charge of both the dossier project and the opposition research on Browder. He attended a Manhattan court hearing with Veselnitskaya prior to her visit to the Trump building...