https://theconservativetreehouse.com/2019/04/22/spygate-and-the-steele-dossier-were-the-cover-story-the-real-issue-is-years-of-obama-era-surveillance-and-political-spy-operations/#more-162824
From the beginning most people have thought the Fusion-GPS objective was to dig up dirt on Trump for political exploitation. However, with all the recent information outlined there’s actually a more significant role for Fusion.
The overall intelligence apparatus of the U.S. government was already conducting political surveillance on their political opposition. The systems of the intelligence apparatus such as FISA-702(16)(17) databases searches were being exploited months (if not years) beforehand.
When NSA Director Admiral Mike Rogers discovered the use of the database he shut down contractor access on April 18th, 2016.
When Fusion GPS was hired by the DNC and Clinton team; also in April of 2016 immediately following the shut-down of FBI contractor access; it now appears the purpose was to provide cover for government surveillance already taking place. Perhaps part of that motive was fear of what NSA Mike Rogers might do.
The Obama administration (U.S. government intelligence apparatus) needed an external source of information that could cover their domestic surveillance and spy operations. That’s why Fusion GPS was hired, and why emphasis was put on using European and Australian intelligence contacts to create the plausible process to continue surveillance that was always taking place.