Donald Trump’s plan to slap punitive tariffs on Canadian imports will drive up prices for American motorists, oil producers warned, as companies scrambled to respond to the US president-elect’s threats.

Canadian Prime Minister Justin Trudeau has said his country is prepared to work with the US in "constructive ways" after President-elect Donald Trump said he would introduce 25% tariffs on goods coming from Canada.

Mexico has had a more fractious relationship with the US but the trilateral US-Mexico-Canada trade deal has held together. China may be the known adversary but local stock markets shrugged off Trump’s late-night social media post;

Ford says he is pressing Prime Minister Justin Trudeau to take action on border security, but he is also planning a “full-out campaign” to appeal directly to U.S. governors of states that do a lot of trade with Ontario. The premier says many states and industries depend on resources such as energy and critical minerals from Ontario and Canada.