Congress should put their mouths where their money is. They should make binding commitments to ensure higher US oil prices and thereby sufficient demand for fuel-efficient cars and trucks in the future.
My advice to Team Obama: Do not be intellectually bound by the textbook Keynesian model. Be prepared to recognize that the world is vastly more complicated than the one we describe in ec 10. In particular, empirical studies that do not impose the restrictions of Keynesian theory suggest that you might get more bang for the buck with tax cuts than spending hikes.