The lawsuit was filed today in federal court in Chicago by Rude Music Inc., the Palatine-based music publishing company owned by Frank Sullivan, who, with Jim Peterik, composed the song and copyrighted it in 1982. The lawsuit states that as early as 2009, Gingrich has entered rallies and public events to the pulsing guitar riffs of the song, which was the background track to Rocky Balboa's training montages in the film and became a No. 1 hit.