If enacted, a 25% tariff on all auto parts from Canada or Mexico will add $2,100 in cost to the consumer for each U.S. assembly vehicle, according to Wells Fargo estimates. As for

Shares of US automakers tumbled on worries that a new round of tariffs imposed by President-elect Donald Trump will cause sticker prices to soar even further.

The president-elect announced on Monday that he intends to impose a 25 percent tariff on goods from Canada and Mexico.

What would it take for Donald Trump to declare a win and drop plans for potentially devastating tariffs? It's the multibillion-dollar enigma now rippling across North America. Details are scant but one thing is clear: We're entering a new chapter,