I recall reading somewhere that the movie “Knute Rockne: All American” had the Ronald Reagan speech cut out of TV showings in 1980 as it was determined that that would have been unauthorized political advertising.
Reagan played George Gipp (the Gipper). Can’t recall any speech he made in the movie except on his death bed. Rockne was played by Pat O’Brien. It was Rockne’s speech, “Win one for the Gipper” that is most remembered.