How could I analyze this case using IRAC method? What are the international trade rules involved in this case?

Canada is the largest exporter of soft lumber to the United States. Recently, the US has

declared that Canada is dumping its soft lumber into the US and thereby damaging the

United States market because the US domestic prices for soft lumber in the US are higher

than the Canadian prices for soft lumber in the US. With the US presidential election less

than a year away, the US president decides to raise tariffs on Canadian dairy products

imported into the US. Most of the US dairy farmers are in states that are needed for the

US president to win re-election. The Canadian diary industry is culturally important to

Canada. Most Canadian dairy farms also farm other products that are essential to the food

supply chain of Canada. The Canadian dairy industry would be severely negatively

impacted by the increased tariffs. The Canadian prime minister is asking you for a written

recommendation on the following questions, "Do the US positions violate international

trade law and what should Canada do in response?"