Just how much clout do the oil and gas industry lobbyists wield? How about 12 million dollars worth, over the last two years alone! No wonder the head of the American Petroleum Institute is threatening "huge political consequences" if President Obama does not approve the Keystone XL pipeline. We'll talk to the researcher who heads an organization that keeps track of such things, Jeffrey Ernst Friedman, Director at MapLight, a "nonpartisan research organization that reveals money's influence on politics".