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.

Faced with tariffs imposed by U.S. President Donald Trump, some countries have, so far, responded by turning the other cheek, and not retaliating with their own duties. Canada, however, continues to hit back in the trade war with its neighbour to the south.

The US won't allow Canada ripping off anymore, Trump said. "We've been ripped off for years and we're not going to be ripped off anymore. No, I'm not going to bend at all -- aluminum or steel or cars,