Donald Trump has hit back at Canada after a breakdown in negotiations plunged the two countries into a trade war.In his first public comments since negotiations collapsed on Friday in Washington, the US president wrote on social media: “Canada wants the benefits of being a State, without being one!!!”“They have also charged our great farmers, for many years, massive amounts of tariffs,” he added. “No more!!!”His comments came after the US imposed 50% tariffs on $20bn (£14.6bn) worth of Canadian goods, while ...