"I Hear America Singing" represent or justifies the nickname "Poet of Democracy" in that Whitman is recorded to have had a faith in the "inherent dignity and nobility of the common man."
Walt Whitman is an American poet of repute and is also known as the poet of democracy given his expressiveness via poems about the democracy of America.
One of the words he did is also titled "Song of Myself" a hymn to Democracy.
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