President Donald Trump said the U.S. will impose an additional 10% tariff on any countries aligning themselves with the "Anti-American policies" of the BRICS group of developing nations, whose leaders kicked off a summit in Brazil on Sunday.

U.S. President Donald Trump warned early Monday that countries that support of BRICS nations -- Brazil, Russia, India and China -- would be slapped with an additional 10% tariff when across-the-board