After playing this game for two years and listening to Enclave radio over and over, I only now noticed that the Star Spangled Banner is absent from the playlist. Seems conspicuously absent. I'm guessing for political reasons? (That song being our real life national anthem..) Did Bethesda ever say why they didn't include it? Just curious.
I think it is meant to be a subtle clue that in spite of their propaganda, the Enclave does not represent the American people, nor the ideals of the United States.
Just as Eden imitates former human presidents to make himself seem more presidential. Abraham Lincoln grew up in rural Kentucky with a dog named Honey, for instance, and of course Franklin Roosevelt invented the concept of the Fireside Chat.