On June 24, the U.S. Congress cleared a legislative bill authorizing President Barack Obama to pursue negotiations for the Trans-Pacific Partnership free trade agreement, ending weeks and months of partisan bickering.

To get a clear overall picture, it is essential to recognize two facts. One is that Obama is being punched from both sides and pushed into a corner like a losing boxer. The other is that regardless of the result of his fight with Congress, the United States will become increasingly self-centered in pursuit of its national interests in international trade negotiations.

The U.S. Constitution gives power to negotiate trade-related matters to Congress. Unless Congress delegates the power to the administration, the Office of the U.S. Trade Representative, which is under immediate control of the president, does not have any more authority to negotiate trade deals than "an errand boy."