The themes are grief, negativity, and depression. You can see this through the mood of the protagonist and the overall mood of the story.
Answer:
As regards the poem, America is described as a merging of a variety of voices, American voices. He describes it as what people sing while working. People is portrayed as very different from each other but with the same vision of the country. America is seen as plural, many occupations and skills but it has equal opportunities for them
