The internet proverb known as Godwin’s Law warns of the increasing likelihood of a Nazi or Hitler reference the longer a conversation goes. That law would seem to apply to Donald Trump in a different way: The longer he runs in (and atop) the Republican presidential primary, the probability of him sounding like a Nazi increases.

Jeffrey Tucker made the argument in Newsweek earlier this summer, noting that Trump’s outlook is simultaneously conservative and totalitarian. Conor Lynch later echoed that in Salon. But in a new Yahoo News profile, Trump makes an alarming proposal that echoes the practice of making Jews in Europe wear yellow badges.

Look at what he told Yahoo’s Hunter Walker, after insisting that “we’re going to have to do certain things that were frankly unthinkable a year ago” to monitor Muslims in America:

Yahoo News asked Trump whether this level of tracking might require registering Muslims in a database or giving them a form of special identification that noted their religion. He wouldn’t rule it out.

Who will be the next people to frighten Donald Trump? Will they have to wear a badge, too?