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.

Canada will respond immediately with a series of forceful countermeasures if the U.S. President Donald Trump goes ahead with a threat to impose tariffs, Prime Minister Justin Trudeau said on Friday. "It's not what we want,

Roughly $900 billion in annual trade between Canada and the United States — and, with it, traditionally chummy bilateral ties — is on the brink of upheaval, with President Donald Trump threatening to impose sweeping tariffs on Canada as early as this weekend.