No fan of Donald Trump, David French of National Review Online nonetheless sees the damage done by one particular anti-Trump collection of documents.

The Mueller investigation has concluded, and Mueller’s declaration has now entered the public record: “The investigation did not establish that members of the Trump campaign conspired or coordinated with the Russian government in its election interference activities.” But it’s worth reflecting on how the contrary view — the firm conviction that Trump did coordinate with Russia — became so deeply embedded in the hearts and minds of millions of Americans. And it’s worth reflecting on why another set of Americans could look at actual, troubling evidence of Russian contacts and simply not care at all.

The answer is complex, but at its heart is a set of documents compiled into a collection known as the “Steele dossier.” The dossier, characterized by James Comey under oath as “salacious and unverified,” consisted of opposition research compiled by a former British intelligence officer and commissioned by the Hillary Clinton campaign. Taken as whole, it undermined the credibility of American intelligence agencies, corrupted elements of the media, and distorted the public debate. It may well be one of the most malignant documents in modern American history. …

… An odd sort of consensus developed on the left and the right. In essence, it was this: The dossier is the scandal. On the left, a kind of blind faith emerged that the purpose and ultimate inevitable outcome of the Mueller investigation were to prove the core claims (if not all the specifics) of the dossier. …

… On the right, when the dossier became the scandal, that meant that misconduct — even lies about contacts with Russians or Russian assets — that fell far short of the dossier’s grandiose claims was treated simply as no big deal.