President Barack Obama and Mitt Romney are besieged with advice about how to score points with voters in three debates starting day after tomorrow. But with almost half the electorate, it may be getting too late. Early voting is already underway in states that could decide the outcome before Election Day. Meantime, Republicans have made "voter fraud" a major issue, and Republican legislatures have passed "voter ID" laws, even when there's not much evidence that fraud is widespread. Now, in one of this year's political ironies, the Republican Party has fired Strategic Allied Consulting — a firm it hired to increase GOP registration. We hear how new forces are re-shaping national campaigns.