And the behavior of FBI agents and federal prosecutors who promoted that faulty evidence may disturb us more than we now know.

The first, the Christopher Steele dossier, has received enormous attention. And the more scrutiny it receives, the more its truthfulness wanes. Its credibility has declined so much that many now openly question how the FBI used it to support a surveillance warrant against the Trump campaign in October 2016.

At its best, the Steele dossier is an "unverified and salacious" political research memo funded by Trump's Democratic rivals. At worst, it may be Russian disinformation worthy of the "garbage" label given it by esteemed reporter Bob Woodward.