It's the final night of the Democratic National Convention, and that means it's time for the president himself to take the stage. No one seems entirely sure what he'll say, though USA Today believes he'll use the chance to define himself in his own words—in contrast to the "fictional Barack Obama" he says Republicans are running against. The AP wonders if he'll give any second-term policy specifics, and whether he'll join the Democratic pile-on on Mitt Romney. Here's what else to watch for: