Yeah, if tape comes out of Trump actually saying the N-word, his supporters will start saying it publicly and they’ll have it branded on campaign hats within a week.
I mean, Trump has said many things that would normally have ended his political career. If he began using such words now, there'd be an initial shock, but his core supporters in the GOP we be, "Well, finally. It's about time we get to say '****** ****** ******.'"