The Fusion GPS-Steele dossier was, in its embryo stage, conceived by those who run a conservative Republican website headquartered in the Swamp. No one disputes that.
A more definitive description of the news outlet might be: GOP Establishment-aligned.
On October 27, 2017, Matthew Continetti and Michael Goldfarb, respectively Editor-in-Chief and Chair of the Washington Free Beacon (WFB), posted this statement on their website: