text:  " The <unk> Blues " is regarded as one of Lead <unk> 's best original works , but it also drew controversy . There is doubt over the song 's authorship , with some scholars <unk> that Lead <unk> was unlikely to have written a work in a genre new to him without a collaborator . <unk> have been raised over his role in the American Communist Party and whether he and the song were used to further the party 's political goals . 
  