ENERGY POLICY: Talk of changes to Mexico's oil monopoly stirs cautious enthusiasm in U.S. Nathanial Gronewold, E&E reporter Published: Friday, July 5, 2013 HOUSTON -- Is an energy revolution about to be unleashed south of the border? Please subscribe to EnergyWire to read the full story. Username: Password: Forgot your access codes? Recover them. Not a subscriber? Sign up for a trial. Ready to subscribe? Click here.