Ontario Premier Doug Ford said Thursday he's dead serious about withholding energy exports to the U.S. if president-elect Donald Trump goes ahead with his plan to hit Canadian goods with steep tariffs that could cripple the economy.

Premier Doug Ford says that cutting off the energy supply to the U.S. remains a “last resort” amid the threat of a promised 25 per cent tariff on Canadian goods but he is warning that his government is ultimately prepared to use “every tool” in its toolbox “to protect the livelihoods of the people of Ontario.

Canada could halt oil and gas imports to the U.S. if Donald Trump imposes steep new tariffs, Ontario Premier Doug Ford warns.

At a meeting with the prime minister and other premiers, Ontario's Doug Ford said Canada needs to be ‘ready to fight’ if Donald Trump follows through on his 25 per cent tariff threats. Ford even threatened to stop Ontario's energy exports to the U.

Doug Ford, the Premier of Ontario and leader of Canada’s progressive conservative party, joins CNBC's 'Power Lunch' to discuss potential U.S.-Canada tariffs, the positions of the economies in China and Mexico,