Americans for Prosperity, the conservative group f(o)unded by that cartoonish industrial tycoon tandem known as the Koch brothers, is having a little conference in Washington this weekend called "Defending the American Dream." Herman Cain, whose campaign is essentially a wing of Americans for Prosperity, gave a big speech there today! Did he try to play down his Koch ties? Not exactly. "'I am the Koch brothers' brother from another mother!" he blared out, twice. American Dream = Defended.