You would have a hard time even twisting symbolism enough to find the United States even mentioned as a player in the Book of Revelation, Daniel, or anywhere else. Most theologists believe that it isn't. Maybe in Daniel when it talks of the 4 Beasts. But most people would disagree.
With that being said, the question is why? If you are a Bible believing Christian, then this has to be concerning for you as an American in times like these. The most powerful nation in the world (currently) not a player at the end? Hmmm...