Donald Trump's self-imposed deadline for a first round of tariffs on Canada, Mexico, and China looms in less than two days as economic observers and world leaders try to plan amid the uncertainty.

After promising during his election campaign to impose an immediate barrage of tariffs on US imports, President Donald Trump has reiterated his plans to begin with 25% levies on imports from Canada and Mexico on Feb.

Trump has threatened still more tariffs, proposing 25% on goods from Mexico and Canada, an additional 10% on China and 25% on Colombia after that country initially refused deportation flights from the U.