As Robert Reich, a former labor secretary under Bill Clinton, once asked, with reference to the United States, “Where does the biggest gorilla sit? Anywhere it likes.” Dairy has long been a protected sector in the United States, which has a history of constructing its own reality with respect to freeing up international trade in agricultural products, milk included, and of ignoring or renegotiating commitments when they did not suit the government of the day. This background paper explores the historical evolution of US trade and agricultural policy as seen through its position on the dairy file in international trade regulations.