The Steele dossier, also known as the Trump–Russia dossier, is a controversial political opposition research report on the 2016 presidential campaign of Donald Trump compiled by counterintelligence specialist Christopher Steele. From Wikipedia
Investigations follow a declassified CIA review by John Ratcliffe, whose findings contradicted Brennan’s sworn testimony on the Steele Dossier, exposing procedural flaws in the 2016 election interference assessment.