It was all a hoax:

WHAT SPECIFICALLY DID DURHAM FIND?
Durham found that the FBI acted too hastily and relied on raw and unconfirmed intelligence when it opened the Trump-Russia investigation.
He also claimed that FBI investigators fell prone to “confirmation bias,” repeatedly ignoring or rationalizing away information that could have undercut the premise of their investigation, and he noted that the FBI failed to corroborate a single substantive allegation from a dossier of research that it relied on during the course of the probe.

“An objective and honest assessment of these strands of information should have caused the FBI to question not only the predication for Crossfire Hurricane, but also to reflect on whether the FBI was being manipulated for political or other purposes,” the report said, using the FBI’s code name for the Trump-Russia probe. “Unfortunately, it did not.”

[apnews.com]

Of course, and the Republicans will roll over and play dumb for him.