David Maraniss takes a closer look at the significance of Bill Clinton's address at the Democratic National Convention, which is slated for Wednesday:

On Wednesday night here, Clinton will be tasked with a mission that has largely frustrated President Obama: Cut through the political clutter and clarify the choice in November. Explain, in his inimitable way, in language that persuadable voters in middle-class America can understand, what Obama has accomplished and why his economic policies would pull the nation out of tough times and GOP alternatives would not.