The United States and Canada maintain the world’s largest bilateral trading relationship, one that has been strengthened over the past two decades by the approval of two major free trade agreements.
Although commercial disputes may not be quite as prominent now as they have been in the past, the two countries in recent years have engaged in difficult negotiations over items in several trade sectors, including natural resources, agricultural commodities, and intellectual property rights. (…) However, these disputes affect but a small percentage of the total goods and services exchanged.
From a recent report on Canada-U.S. Relations from the Congressional Research Service.
