It is now understood that the FISA court judge that signed the warrant to spy on the Trump campaign was never aware that the evidence provided was paid for by the opposition (The DNC and Clinton campaign). It is also known that the FISA court had already turned down an application to spy on the Trump campaign before the Steele dossier. This seems like blatant deception was used to achieve the goals of biased individuals in the FBI.
3.) Court Notification