The economies of Canada and America are joined on the hip. Some $2bn of commerce and 400,000 individuals cross their 9,000km of shared border day-after-day. Canadians on the west coast do extra day journeys to close by Seattle than to distant Toronto. No marvel the 2 economies have largely moved in lockstep in latest many years: between 2009 and 2019 America’s GDP grew by 27%; Canada’s expanded by 25%.