Canadian Prime Minister Mark Carney has hit back at U.S. Commerce Secretary Howard Lutnick as the blame game over the stalled Canada-U.S. trade deal intensifies.Carney dismissed Lutnick’s assessment of Canadian politics, saying: “I don’t think, with all respect, appointed, unelected Cabinet members in the United States are experts on Canadian politics.” The remarks came after Trump administration officials accused Carney of walking away from a potential agreement for political reasons.