After reading this article I felt depressed. Despite earlier hopes, when the question of moving towards legalizing pot came up recently, Obama said, "No." The case is made for legalizing and taxing marijuana to save the US billions by both bringing in more revenues (taxes) and reducing costs (law enforcement and the "war on drugs").
In the first part of this video, Calif. Assemblyman Tom Ammianomakes the case for doing it at the statewide level, as he has already sponsored a bill to do so: