Trump’s metals tariff tweet roils Brazil, Argentina

WASHINGTON/RIO DE JANEIRO (Reuters) - The U.S. President on Monday sent shock waves through Brazil and Argentina, announcing he would restore tariffs on U.S. steel and aluminum imports from the two countries in apparent retaliation for currency weakness he said was hurting U.S. farmers.

In an early morning tweet that sent officials from both countries scrambling for explanations from Washington, Donald Trump said Brazil and Argentina were "presiding over a massive devaluation of their currencies."

Both countries have actively been trying to strengthen the real and the peso against the dollar. Their currencies have been buffeted by weakness that analysts partially attribute to Trump's larger trade battle with China.