Take your pick: "The FBI got fooled by a source, or it knew its source was lying, or it didn’t bother to check, or it was too incompetent to see the obvious."

Excerpt:

The Grassley referral needs be fully declassified, just as the House memo was. The FBI needs to answer straightforward questions about Mr. Steele’s claims, and he needs to provide his version. The FBI got fooled by a source, or it knew its source was lying, or it didn’t bother to check, or it was too incompetent to see the obvious. Take your pick. None of the possibilities look good, especially if you’re a FISA judge.

[Ms. Strassel writes the Journal’s Potomac Watch column.]

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