Canada attacks US tariffs by taking case to World Trade Organization

The case could expand into a multinational trade dispute given that Canada filed it in a way that allows other countries to join

Canada has filed a sweeping trade case against the United States at the World Trade Organization (WTO), lobbing a diplomatic grenade at the Trump administration’s “America First” approach amid an increasingly embattled trade relationship between the longstanding North American allies.

The trade case could exacerbate tensions between the two nations, which have frayed in recent months as the countries wrestle with trade disputes and attempts to renegotiate the North American Free Trade Agreement. Canada’s case challenges the US use of tariffs to punish unfair trade practices and protect its markets, saying those actions violate WTO rules.

The case could expand into a