Read more from Sky News:Why China has not retaliated more in Trump trade spatWhat's going on with Trump and tariffs and what does it all mean?.
Canada's auto capital and America's motor city are divided by the Detroit River, tied by the Ambassador's Bridge which transports $323m (£260m) worth of goods between Canada and the US every day.
Donald Trump's threatened 25% tariff on all Canadian exports - with a carve-out for energy at 10% - would have weighed heavy here, and that's putting it mildly.
The mayor announced on Monday that he would suspend funding for the cross-border tunnel bus, which transports 40,000 Canadians to Detroit each year for shopping or entertainment, or whatever it is they might choose to do there.
The tariff would have put tens of thousands of jobs on the line in Ontario - in the auto industry, in agriculture, and in the energy sector too.
