Joe,
We know that the political message within a song depends to some extent on the interpretative powers of the listener.
Take rap’s first great message song — appropriately titled “The Message.” Some listeners infer from the track a scathing indictment of years of racism in America.
Others infer a scathing indictment of years of welfare state failures.
If you accept the second inference, “The Message” would qualify as a conservative song.