Justice Department Inspector General Michael Horowitz’s 500-page report covers plenty, but it can be distilled to two words he uses to describe the Federal Bureau of Investigation during the 2016 election: insubordination and bias. Two terms that are chilling in connection with such a powerful agency.

That won’t be the message from Democrats and most of the press, who will focus on a few episodes they will claim cost Hillary Clinton an election. Watch for them to blame former FBI Director James Comey, whom the report faults...