In this short poem, the speaker begins by claiming that he, too, "sing[s] America" (1). He goes on to note that he is "the darker brother" (2), referring to his skin color, and then makes reference to the fact that he is sent "to eat in the kitchen / when company comes" (3-4), as if he were a black slave in a white household. The oppression, however, doesn't stop him from laughing and growing strong.
Then the speaker envisions a future in which he is no longer sent to the kitchen, in which no one would dare to call him unequal. They (presumably, the white majority) will see him as beautiful and "be ashamed" (17) at their previous prejudice.
The poem concludes with the speaker asserting, again, that he (and, therefore, his race) is indeed American.