If President Trump's tariffs against Canada take effect, Canadian Prime Minister Justin Trudeau said the U.S. would immediately face a raft of countermeasures on Tuesday. Why it matters: Trump's comments Monday that he would impose 25% tariffs on Canada and Mexico sent markets sliding amid fears it could start a trade war,

Canada will impose 25% tariffs on C$155 billion ($107 billion) worth of U.S. goods from Tuesday if U.S. President Donald Trump's administration follows through with its proposed tariffs on Canadian goods,

The government will be consulting the public and stakeholders for a second tranche of retaliatory tariffs which will include a wide range of products imported from the U.S. such a