Recent signs that the economic recovery is flagging have introduced a new tension into the bipartisan budget negotiations.
Not many things have emerged from the quagmire of US Congress recently which have produced a truly pleasant surprise. But could the troubled asset relief programme - better known as Tarp - turn out to be one?
What does the rise of libertarianism portend for the future of the US? This is not a question of interest to Americans alone. It matters almost as much to the rest of the world.