Could American courts end up being allies for Canada in the tariff tiff with President Trump?

It looks like this might not just be a pipe dream.

The U.S. Federal Court of Appeals for the Federal Circuit heard arguments in V.O.S. Selections et al. v Donald J. Trump last week. This high-profile case challenges President Trump’s use of the 1977 International Emergency Economic Powers Act (IEEPA) to declare a national emergency and impose tariffs on much of the world, in addition to more specific tariffs imposed on Canada.