There was a second "dirty dossier" authored by the worst sleazebag in the Clinton camp, sent directly to the US State Department and from there via a convoluted route o the FBI. The dossier is said to be even sleazier than the Christopher Steele one. This was what went into the application to the FISA court to spy on the Trump campaign.
Michael Isikoff, former journalist, now just a receptacle for Deep State propaganda, was working with the DNC against Trump: his Yahoo piece was cited by the Obama administration in their application to spy on the Trump campaign.
The Senate Judiciary Committee has issued a criminal referral to the Justice Department against "former" MI6 agent Christopher Steele for lying to the Committee under oath.:

"It appears the FBI relied on admittedly uncorroborated information, funded by and obtained for Secretary Clinton's presidential campaign, in order to conduct surveillance of an associate of the opposing presidential candidate. It did so based on Mr. Steele's personal credibility and presumably having faith in his process of obtaining the information. But there is substantial evidence suggesting that Mr. Steele materially misled the FBI about a key aspect of his dossier efforts, one which bears on his credibility."