IG Horowitz says FBI's Trump probe was a failure by 'the entire chain of command'

Justice Department Inspector General Michael E. Horowitz will told lawmakers Wednesday the FBI’s investigation into alleged ties between Russia and the Trump campaign was a failure by the bureau’s “entire chain of command.”

Testifying before the Senate Judiciary Committee, Mr. Horowitz said the FBI’s application to monitor a Trump campaign aide was riddled with errors and omissions, and the brass should have better managed the agents.

“It is incumbent upon the entire chain of command, including senior officials to take the necessary steps to ensure that they are sufficiently familiar...