OTTAWA — If restricting oil exports to the U.S. was the first idea to stir controversy among Canada’s leaders as they looked for ways to press President Donald Trump to scrap his tariffs, cutting off its supply of potash might be the second.

And it could lead to an even bigger fight.

“When we’re talking food supply and the ability to grow food, that’s a different kind of animal,” Eric Anderson, executive director of the Saskatchewan Industrial and Mining Suppliers Association, told National Post.