Among the details the FBI didn’t relay, as required, to a secret court when spying on Carter Page was a long previous warning that its chief source, Christopher Steele, was likely fed bad information by Russian intelligence.

This point emerges from a partial opening up of secret portions of the reports of the Justice Department inspector general. It should whet the appetite for parts that remain secret, especially concerning the apparently false and possibly manufactured Russian intelligence that then-FBI Director James Comey...