This isn't the first time he's advocated for a cause he believes in via his clothing choice on national television. CM Punk will wrestle this Saturday night in the men's WWE Elimination Chamber ...

CM Punk is the hottest topic in wrestling ... one segment of the interview appears to have been overlooked, and that was when Punk was discussing MJF's potential within the industry.

CM Punk has been no ... week on WWE Raw on Netflix. Punk made a statement about his support for public education by wearing a "CTU" Chicago Teachers Union shirt during the show.