Prime Minister Justin Trudeau and the premiers will meet Wednesday to discuss strategy as president-elect Donald Trump threatens to upend the bilateral relationship with punitive tariffs on everything Canada sends to the U.

A government official says Canada is already examining possible retaliatory tariffs on certain items from the United States should President-elect Donald Trump follow through on his threat to impose sweeping tariffs on Canadian products.

Prime Minister Justin Trudeau on Tuesday said Canada must stay united against a threat by Donald Trump to impose tariffs but two major provinces quickly called on him to address the U.S. President-elect's concerns.