The president-elect said that he would impose the across-the-board tariffs on Day 1 and that they would stay in place until Canada, Mexico and China halted the flow of drugs and migrants.

President-elect Donald Trump's threat to impose tariffs on Canada, China and Mexico on the first day of his administration could dramatically raise prices for Americans on everything from cars to clothes to oil.

Canada is the top export destination for 36 U.S. states. Nearly $3.6 billion Canadian (US$2.7 billion) worth of goods and services cross the border each day.