Richard Spencer is the most famous white supremacist in the United States, which is a bit like being the country’s most famous concertina player: something for the almanac, perhaps, but nothing to write home about. , Spencer’s blog founded in January, is modestly trafficked, as was its predecessor, Alternative Right . Spencer moves a small amount of Twitter traffic compared with fellow alt-right celebrities such as conspiracy theorist Mike Cernovich or, before he was banned from the social-media platform, former Breitbart editor Milo Yiannopoulos. (Both of them have distanced themselves from Spencer.) Unlike Cernovich, who has been approvingly tweeted by the sons of Donald Trump and former national-security adviser Michael Flynn, Spencer has no observable link to the new administration. And when Spencer’s pseudo–think tank, the National Policy Institute, held a conference in Washington, ., last fall, about 200 people attended.