On Tuesday, U.S. President Donald Trump signed a new executive order that raised tariffs on steel and aluminum from 25 per cent to 50 per cent. One Canadian steel producer said this means that their American business is now ‘unviable’.

Jason Kirby is a staff reporter for The Globe’s Report on Business section. He explains why these higher steel and aluminum tariffs could mean higher prices on nearly everything, and what may have contributed to Trump’s escalation. 

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