President Donald Trump said the sweeping tariffs that he has imposed on Mexico, Canada and China may cause "short term" pain for Americans as global markets reflected concerns the levies could undermine growth and reignite inflation.

Canada and Mexico ordered retaliatory tariffs on American goods in response to sweeping tariffs imposed by President Donald Trump, and businesses and consumers in both countries questioned Sunday how the new trade war might affect them.

Prime Minister Justin Trudeau set out "far-reaching" tariffs of 25%, affecting 155bn Canadian dollars' worth ($106.6bn; £86bn) of American goods ranging from beer and wine, to household appliances and sporting goods.