I’ve yet to see any evidence that the American polity is avid for more sophisticated public policy discussion. Frankly, they seem a lot more interested in plausible enemies and improbable free lunches, which is the level on which both parties are mostly campaigning.
American political debate consists almost entirely of Us and Them scare tactics in which talk show hosts appear to be the face of party policies more than the politicians themselves. Imagine, if you will, a Britain in which Jeremy Paxman thinks Cameron is Hitler and Melanie Philips thinks Gordon Brown is a Communist, and that is all people know or want to know about either of the main parties. That’s basically America at the moment. Reason does not hold sway, to say the least.