Not only did the FBI not do it’s job, it covered up an internal conspiracy to keep Trump out of the White House.
That’s a federal crime on many levels: collusion, election tampering, conspiracy, subversion.
All federal crimes under US law.
That’s what the “Russian collusion” thing is all about: a disctraction from the real collusion going on within our own gov’t to determine the outcome of our elections.
“Horowitz’s real assignment was not to investigate, but to cover up the crime, which he did by finding that the FBI made a large number of “mistakes” that the FBI director promises new controls in place to prevent in the future. Thus Horowitz did his job. He converted crimes into “mistakes.” That is the way Washington works“.