All 13 of Canada's provincial and territorial leaders were in the US capital as the country seeks to avoid punitive trade tariffs.

U.S. President Donald Trump's planned 25% tariffs on all steel and aluminum imports would be added onto other levies on Canadian goods, resulting in a total 50% tariff, a White House official said on Tuesday.

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Canada tops the list of all the countries that import steel and aluminum into the United States, however the challenges posed by a new 25 per cent tariff regime from the Donald Trump administration will adversely affect our southern neighbour too,

The president, who has threatened and delayed other tariffs, said he will announce the measures Monday. Canada and Mexico are among the top U.S. steel suppliers.