think of it as a one, two, three political punch. exactly six weeks to go until the november election, and three of the most famous names in america are heading out to fight for their candidates. first lady michelle obama, now joining former president bill clinton and former alaska governor sarah palin, as the power hitters on the campaign trail. and the president, well, today, we learned that as the elections loom, he is going to shake up and rebuild his economic team. more on that in a minute. but we'll begin with our senior ut to hit the campaign trail. the white house calls her the closer. and with time running out for congressional democrats, they're sending her in. the first lady's political travel schedule reads like a who's who of endangered