Trump's metals tariff tweet roils Brazil, Argentina

WASHINGTON (Reuters) - U.S. President Donald Trump on Monday said he would restore tariffs on U.S. steel and aluminium imports from Brazil and Argentina, surprising officials in the two South American countries and prompting them to seek explanations.Emerging market stocks and the highly sensitive Mexican peso slid to session lows following Trump's vow, which came in an early morning post on Twitter that gave no other details on the planned trade action. Representatives for the Office of the..