Trump made the threat in a social media post as tensions rise between the US and its northern neighbour.

Trump has been incensed with Carney ever since his attention-grabbing speech at Davos describing a 'rupture' in the world order.

Canada has agreed to sharply roll back its 100 percent tariff on Chinese electric vehicles, striking a trade-off that signals a broader reset in its relationship with Beijing and a notable divergence from Washington.

Canada's Prime Minister Mark Carney warned of a 'rupture' with the US over tariffs and Trump's insistence on controlling Greenland.