What is happening to our norms against racist speech?

Until recently, the accepted wisdom in the US was that overt racism would doom a national political campaign. This led to the use of covert messaging strategies like dogwhistles. Recent political events have called this wisdom into question. In this paper, I explore what has happened in recent years to our norms against racist speech, and to the ways that they are applied. I describe several mechanisms that seem to have contributed to the changes that I outline.