There are, very roughly speaking, two kinds of swing voters. One kind is economically conservative, socially liberal swing voters. This is the kind of voter you usually read about, because it’s the kind most familiar to political reporters – affluent and college educated. But there’s a second kind of voter at least as numerous – economically populist and socially conservative. Think of disaffected blue-collar workers, downscale white men who love guns, hate welfare, oppose free trade, and want higher taxes on the rich and corporations. Romney appeals to the former, but Santorum more to the latter