President Trump is locked in a tit-for-tat tariff war with Canada, Mexico, the European Union and China in a bid to remake the US economy for the long term – and some early winners and losers have already emerged.

As Canada and Mexico make plans for reciprocal tariffs on U.S. goods, Canadian Prime Minister Justin Trudeau calls President Trump's move "a very dumb thing to do."

Beijing, which set steep duties on canola, peas and pork, wants Canada and Mexico to resist U.S. pressure to raise tariffs on Chinese goods.