Trump has said repeatedly he wants Canada to become the 51st state. It's a statement sometimes laughed off in the U.S., but viewed as deadly serious in Canada.

Canada could impose non-tariff measures such as restricting its oil exports to the United States or levying export duties on products if a trade dispute with the U.S. escalates further, Canada's energy minister Jonathan Wilkinson said on Tuesday.

Mark Carney, Canada’s incoming prime minister, is no stranger to crises. Now he faces what is arguably the challenge of a lifetime: President Trump. Matina Stevis-Gridneff, the Canada bureau chief for The New York Times,

Canada's retaliatory tariffs as a permanent policy tool are economically counterproductive and may slow the implementation of climate initiatives.

Canada will impose retaliatory tariffs on U.S. imported goods worth C$29.8 billion ($20 billion) effective on Thursday in response to U.S. President Donald Trump's steel and aluminum tariffs, Canada's Finance Minister Dominic LeBlanc said.

After a fresh wave of tariffs from the United States, Canada and the European Union said they would impose billions in levies on U.S. goods.