US President Donald Trump has threatened to impose new tariffs on Canada after smoke from devastating wildfires left much of the northern US suffocated by a dense haze.

In a post on Truth Social, the US president said the US has been invaded by dirty air. “ The cost of this pollution must of necessity be added to the Tariffs Canada is currently paying,” he wrote.

The threat was in response to objections by US lawmakers over the wildfires and Ontario’s premier Doug Ford asking the US to send assistance and support to fight the fires rather than complain.

Following Trump’s remarks, Carney’s emergency management cabinet minister said the two countries maintain constant communication and share an........

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