God, I can't remember what started the "Speak Truth to Power" craze.
Maybe it was Conyers?? I'm sure someone will remember.
I don't know who originally said it, but I never heard it until I moved to Detroit. I don't think Conyers was the first to say it-it's usually said in a politically motivational context-have you ever heard Conyers speak? He's not exactly a gifted speaker.