Trade Promotion Authority (TPA) has been passed by both houses of Congress and signed by the President, setting the stage for the final negotiations of the Trans-Pacific Partnership (TPP). So what is the TPP? Which countries are involved? How will the partnership benefit American businesses? What concerns do critics have regarding the progressive agreement? Below we provide a breakdown of the ambitious new free trade agreement, which stands to be the largest enacted since the North American Free Trade Agreement (NAFTA).