A worker prepares coils of steel for transport at an ArcelorMittal Dofasco facility in Hamilton, Ontario, Canada, on August 24, 2026. Trade negotiations between Washington and Ottawa broke down late August 22, putting into force new 50-percent US tariffs impacting about $20 billion worth of Canadian goods, or 5.5 percent of Canadian exports to the US. Canada in retaliation said it would match US tariffs, with new levies notably targeting the US steel and dairy industries to take effect on September 8. US President Donald Trump said Monday that he would double tariffs on Canadian vehicles beginning next year, as the historically friendly neighbors spiral towards an escalating trade war. (Photo by Cole Burston / AFP via Getty Images)