Copernicus
Industrial Grade Linguist
The Steele dossier was research on links between Donald Trump and the Russian government, and it was a major factor in focusing the attention of the FBI on certain individuals with ties to Russian intelligence services. It was originally commissioned as oppo research by Republicans and Democrats running against Trump, but the document also got leaked to the public. Naturally, the press focused on allegations of the existence of the so-called "peepee tape" (since people seem more interested in sex and scatological innuendo than just about anything else), the idea being that the Russians would have it as so-called "kompromat" to hold over Trump. It was largely treated as the least serious of the allegations in the report, but Steele says he still believes such a tape might exist. As a former British intelligence agent, Steele was relying on a lot of sources that he had come across in his past, and the dossier has proven largely accurate in its allegations.
ETA: For those who haven't read it already and are interested in it, here is a:
PDF version of the Steele Dossier
ETA: For those who haven't read it already and are interested in it, here is a:
PDF version of the Steele Dossier