Shares of General Motors Co. and Ford Motor Co. were selling off Tuesday, as president-elect Donald Trump’s new tariff threat fueled concerns that a “meaningful” number of auto sales will be lost. Late Monday,

Ontario Premier Doug Ford said Tuesday that U.S. president-elect Donald Trump's threat to slap a 25 per cent tariff on all Canadian goods is "like a family member stabbing you right in the heart."

General Motors Company ($GM), and Stellantis N.V. ($STLA) — slid during mid-day trading Tuesday after President-elect Donald Trump announced plans to impose a 25% tariff on all imports from Canada and Mexico.