Both Mexican President Enrique Pena Nieto and Canadian Prime Minister Stephen Harper will raise the issue of U.S. non-compliance with the WTO on country of origin labeling and NAFTA at the annual North American leaders' summit this week. Defensive in the Middle The political leaders of the U.S., Canada and Mexico meet this week at the annual North American leaders' summit. Mexican President Enrique Pena Nieto has suggested that NAFTA needs to operate more akin to the European Union. Both he and Canadian Prime Minister Stephen Harper will raise the issue of U.S. non-compliance with the WTO on country of origin labeling and NAFTA in terms of allowing Mexican trucking into the U.S. Meanwhile, President Barack Obama will have fewer offensive...