Canada’s prime minister and Mexico’s president ordered retaliatory tariffs on goods from the U.S., following through with their threats after U.S. Donald Trump sparked a trade war by imposing sweeping tariffs on imports from Canada,

As Donald Trump threatened to impose border taxes, the leaders of America's neighbours said they were prepared to act.

The move likely will trigger retaliation and risk igniting a trade war that could cause broad economic disruption for all countries involved.