Canada will respond immediately and forcefully if the United States goes ahead with a threat to impose tariffs, Prime Minister Justin Trudeau said on Friday, warning Canadians that they could be facing tough times.

As the Saturday deadline approaches, Canada’s diplomatic and economic strategies will be closely watched, with hopes that negotiations in Washington will yield a positive outcome for both nations.

Trump said in an Oval Office signing ceremony on Monday that his administration will impose a 25% tax on goods from Canada and Mexico that may come as soon as February 1 – a move that could raise prices for American consumers.