Canada's outgoing Prime Minister Justin Trudeau said on Wednesday that “nothing is off the table” when it comes to responding to proposed tariffs by President-elect Donald Trump, but that no single region of the country should bear the full brunt of that response.

Exactly what president-elect Donald Trump plans to do with his tariff threat remains a mystery to Canadian officials and most Republicans, Energy and Natural Resources Minister Jonathan Wilkinson said Thursday.

The government is preparing for the possibility that the incoming U.S. administration will impose high tariffs on Canadian goods, setting the close allies up for a showdown.