Even though Sen. John Kerry (D-Mass.) has been criticized for a dearth of minorities among the top advisers to his presidential campaign, he can point to the fact that his campaign slogan was inspired by the late African-American poet and writer Langston Hughes. In fact, Kerry wrote the preface to a new collection of Hughes’s poems that will be published by Vintage this month, just in time for the Democratic National Convention. The paperback edition will feature nine Hughes poems “about freedom, brotherhood and the American dream.” In May, Kerry invoked the first two lines of Hughes’s poem “Let America...