according to real sources, the info given to the judge who decided the FISA warrant on Carter Page, who at that time was not even connected to the Trump campaign, made mention of the fact the Steele Dossier was prepared as opposition research. Why that is relevant is beyond me, but it was mentioned. here is the source-
Republicans concede key FBI 'footnote' in Carter Page warrant
Devin Nunes said Monday the FBI had disclosed political backing for a Trump-Russia dossier in October 2016, but a controversial GOP memo released last week did not mention it.
Republican leaders are acknowledging that the FBI disclosed the political origins of a private dossier the bureau cited in an application to surveil former Trump campaign adviser Carter Page, undermining a controversial GOP memo released Friday and fueling Democratic demands to declassify more information about the bureau’s actions.
Democrats pounced on public comments over the past day by House Intelligence Committee Chairman Devin Nunes (R-Calif.) and intelligence committee member Trey Gowdy (R-S.C.), arguing that the GOP memo's failure to mention a key footnote in the FBI application shows how the party has cherry-picked classified facts to protect President Donald Trump.
To provide a fuller picture, intelligence committee Democrats insist, House Republicans must vote on Monday to release a classified 11-page rebuttal they wrote to the GOP memo.
While Republicans say their memo, orchestrated by Nunes and released with President Donald Trump’s backing, demonstrates anti-Trump bias at the FBI and Justice Department that calls into question the entire Russia investigation, Democrats say Republicans committed the very sin
— omitting crucial facts
— of which they accuse the FBI.
The debate revolves around an October 2016 FBI application to a federal judge for a Foreign Intelligence Surveillance Act warrant against Page. That FISA application — and whether the FBI was fully transparent with a federal court that approved it in October 2016 — is at the heart of mounting allegations by President Donald Trump and allies in Congress that the FBI abused its spying authority during the 2016 campaign.
There's no evidence that the FBI spied on the Trump campaign itself. Rather, the warrant for Page was issued in October 2016, a month after he left the campaign — and after Trump campaign officials denied he played a central role. But the surveillance of Page was part of an FBI counterintelligence investigation into whether Trump associates coordinated with the Kremlin to interfere in the 2016 presidential election.
Page is a key figure in the dossier, which makes the unsubstantiated allegation that he held a secret meeting with a top Russian oil executive and a close Putin ally to discuss helping to lift U.S. sanctions against Russia in return for a financial windfall. Page had also been investigated by the FBI in 2013, after he was the target of a recruitment effort by Russian spies in New York City. And the former investment banker and energy consultant also made a summer 2016 trip to Moscow where, after shifting explanations, he now admits he met with Kremlin officials.
The intelligence committee's memo, which Trump declassified Friday, casts Steele’s dossier as a key component of the Page FISA warrant. But the memo doesn't clarify what other evidence might have been used to persuade a court to grant its application, which was renewed several times, including once by Trump's own Deputy Attorney General Rod Rosenstein.
https://www.politico.com/story/2018/02/05/fbi-footnote-carter-page-warrant-390795