The Steele dossier is a product aided by Nellie Ohr that underpinned the FISA application. The FISA application was a product constructed by FBI agent Strzok and DOJ Deputy Bruce Ohr under the authority granted to them by senior FBI and DOJ leadership.
Remember, as Director Chris Wray stated this past week, the FBI Director would be personally responsible for signing off on the October 2016 FISA application. In October 2016 that FBI Director was James Comey.
I also learned yesterday that Wray was Rod Rosenstein’s direct boss at DoJ at the time that Rosenstein put together the people on the team investigating Trump-Russia.