US tariffs on Canada and Mexico take effect, as China takes aim at US farm exports

WASHINGTON (AP) — President Donald Trump’s long-threatened tariffs against Canada and Mexico went into effect Tuesday, putting global markets on edge and setting up costly retaliations by the United States’ North American allies.Starting just past midnight, imports from Canada and Mexico are now to be taxed at 25%, with Canadian energy products subject to 10% import duties.The 10% tariff that Trump placed on Chinese imports in February was doubled to 20%, and Beijing retaliated