The United States is set to impose tariffs of 25% on goods from Canada and Mexico starting Tuesday, while also doubling existing 10% tariff on imports from China. American farmers could pay the price. (Scripps News)

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  CNN - Stephen Collinson • 25m

  CNN — Donald Trump just took the biggest gamble of his young second presidency. His hammer-blow 25% tariffs against Canada and Mexico that hit at midnight dealt a fresh shock to an economy showing alarming signs of slowing growth and rising inflation – a perilous mix for any president. Trump also …