MacDonald was sworn in on Tuesday and said trade issues are "center stage" after speaking with Canada's canola industry and provincial agriculture ministers. Canada faces tariffs from China on Canadian canola meal and oil, as well as peas, pork and seafood products. It is also bracing for an anti-dumping ruling from China on Canadian canola seed exports. There is also a long-simmering dispute over Canada's dairy supply management system, which restricts imports and protects Canadian production. He reiterated Prime Minister Mark Carney's position that the Canadian supply management system is off the table in trade negotiations.