In "I Hear America Singing," the speaker describes people employed in America’s working class. Why do you think the speaker leaves out certain groups, such as the wealthy or political figures?

This is because Whitman doesn't consider these people as part of the working class. They have not toiled in the dirt or in the rank sweat of a factory. Politicians and rich men do not know what physical toil is nor are they relegated to survival for much of their life.