Barack Obama is widely considered one of the most powerful and charismatic speakers of our age. Without missing a beat, he often moves between Washington insider talk and culturally Black ways of speaking--as shown in a famous YouTube clip, where Obama declined the change offered to him by a Black cashier in a Washington, D.C. restaurant with the phrase, "Nah, we straight."

In Articulate While Black, two renowned scholars of Black Language address language and racial politics in the U.S. through an insightful examination of President Barack Obama's language use--and America's...