Fifty years ago Wednesday the Rev. Dr. Martin Luther King Jr. stood on the steps of the Lincoln Memorial and shared his dream with the world. As we pause to remember that iconic moment in our nation’s history, we should reflect on all the progress our country has made since the slain civil rights leader spoke from the steps of the Lincoln Memorial. At the same time we cannot and must not lose sight of the fact that there remains much to be done. I wonder, for example, what Dr. King would have said or would have done after the...