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 about whether the US positions violate international trade law and what Canada should do in response.

also please help me in finding according to which agreement in this scenario decisions will be made and US positions violate international trade law or not and what canada should do