Answer:
"Let America Be America" draws several similarities to the American dream, the American Negro, and MLK's "I Have a Dream" speech. For example, "Let America be America" tells of a dream of freedom, equal opportunity, and justice. MLK's "I Have a Dream" speech tells of a similar dream. "Let America be America" also tells of the difference between how the American dream is expected to be, versus the realities of American life. MLK's speech said that the realities of American life isn't the same of the American dream, so this is another similarity.
(I'm not sure if this is exactly what you were looking for, but at least it is something. Best of luck to you!)