Gas prices are down, the stock market is at a record high and 60 percent of Americans say the economy is in good shape. So why are Republicans in so much trouble? I've been asked this in the past week by several (mostly rich) Democrats and Republicans, so I picked the brains of a number of pollsters. Kathy Frankovic, director of surveys for CBS News, pointed to the finding in the CBS News/New York Times poll conducted Oct. 5 to 8, which said that despite the increase in the number of people saying the economy was in good shape, they...