https://www.c-span.org/video/?c4889597/user-clip-context-biden-n-word
The quote comes around the 17:00 minute mark. He was reading a document, making the point that racism played a part in a hotly debated gerrymandering attempt in Louisiana. I know...But he still said it. We all said it back then, because people understood context at the time. It doesn't play well today, because everyone is offended at their own black shadow. We had thicker skin back then.