Politico: Kicking off her highly anticipated return to the campaign trail Wednesday, first lady Michelle Obama invoked the American dream to remind voters her husband continues to fight to the promises he made during his presidential campaign. "He knows that his life, like mine, is only possible because of the American dream," she said, speaking at a fundraising luncheon for Sen. Russ Feingold. "And keeping that dream alive and within reach for all Americans is what drives him every single day."