Since then, Twitter has updated its policies by banning links that promote “hateful content.” It didn’t say which links might have prompted Duke’s permanent ban, but noted that its policies prohibit the promotion of violence or threats of attack towards people on the basis of religious affiliation, race, ethnic origin and other categories. Other figures definitively suspended from the site include far-right UK activists Katie Hopkins and Milo Yiannopoulis.

According to the Southern Poverty Law Center, Duke is a “figure of the American radical right, a neo-Nazi, longtime Klan leader and now international spokesman for Holocaust denial.” The ban is a good start, but a great many white supremacist figures, including Richard B. Spencer, can still surprisingly be found on the site.