By Cassandra Garrison, David Shepardson and Ben Klayman MEXICO CITY/DETROIT (Reuters) - U.S. President-elect Donald Trump's plan to slap a 25% tax on all imports from Mexico and Canada could strike the bottom lines of U.

General Motors, Ford and Stellantis shares slid Tuesday after President-elect Trump threatened 25% tariffs on all imports from Canada and Mexico. The move by the new administration would likely stop American car demand in its tracks,

Donald Trump's pledge to slap tariffs on imports to the U.S. from Mexico could be more damaging for European car makers like Volkswagen and Stellantis and their suppliers than any direct tariffs on EU goods,

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