Fusion GPS. That’s the oppo-research outfit behind the infamous and discredited “Trump dossier,” ginned up by a former British spook. Fusion co-founder Glenn Simpson also was supposed to testify at the Grassley hearing, where he might have been asked in public to reveal who hired him to put together the hit job on Mr. Trump, which was based largely on anonymous Russian sources. Turns out Democrats are willing to give up just about anything—including their Manafort moment—to protect Mr. Simpson from having to answer that question.

What if, all this time, Washington and the media have had the Russia collusion story backward? What if it wasn’t the Trump campaign playing footsie with the Vladimir Putin regime, but Democrats? The more we learn about Fusion, the more this seems a possibility.