President Donald Trump on Saturday threatened to impose a 100 per cent tariff on goods imported from Canada if America's northern neighbour went ahead with its trade deal with China.

Trump said in a social media post that if Canadian Prime Minister Mark Carney “thinks he is going to make Canada a “Drop Off Port” for China to send goods and products into the United States, he is sorely mistaken.”

While Trump has waged a trade war over the past year, Canada this month negotiated a deal to lower tariffs on Chinese electric vehicles in return for lower import taxes on Canadian farm products.

Trump initially had said that agreement was what Carney “should be doing and it's a good thing for him to sign a trade deal.”