OTTAWA (Reuters), JUNE 12 2018-U.S. President Donald Trump’s blistering attack on Canadian Prime Minister Justin Trudeau has driven bilateral relations to their lowest point in decades and left Ottawa with few options for averting a trade war with its much bigger neighbor.   

Trump blew apart a G7 summit in Canada over the weekend, blasting Trudeau as “very dishonest and weak” and raising the prospect of tariffs against auto imports, a move that would imperil the Canadian economy.