Trump orders new 50% tariff on many Canadian goods

The tariffs take effect in 30 days and cover various items including wine, hockey sticks and cement, said the White House.

Trump, who saw many of his tariffs struck down by the Supreme Court this year, tapped an untested legal provision for the new duties -- Section 338 of the Tariff Act of 1930.

The latest duties will not apply to energy, potash and goods already impacted by sector-specific tariffs.