"In the preparation of the FISA applications to surveil Carter Page, the Crossfire Hurricane team failed to comply with FBI policies, and in so doing fell short of what is rightfully expected from a premier law enforcement agency entrusted with such an intrusive surveillance tool."
Now I don't doubt that this kind of failure might well fall into YOUR definition of the mission of the FBI, but We The People will have the final say on that.
At the link, GOP counsel arrives to the impeachment hearing conspicuously carrying his documentation in a reusable grocery bag, nonchalantly plops it on the table.
https://twitter.com/jiveDurkey/status/1204068431454232580