On December 2, a week before Fernández took office, Trump announced via a series of tweets that he would reinstate tariffs on steel and aluminium imported from Brazil and Argentina, accusing them of manipulating their currencies and hurting US farmers.
"Brazil and Argentina have been presiding over a massive devaluation of their currencies," which was hurting American farmers, Trump said.
"Effective immediately, I will restore the Tariffs on all Steel & Aluminium that is shipped into the US from those countries."
In 2018 Trump had announced global tariffs of 25 percent on steel and 10 percent on aluminium but later approved exemptions for some countries, including Argentina and Brazil which agreed to quotas.
On Friday Trump signed a proclamation to increase tariffs on aluminium imports by an additional 10 percent and those on steel by an extra 25 percent, to take effect from February 8.
Argentina, Australia, Brazil, Canada, Mexico and South Korea were exempt from the additional taxes on derivative steel products while Argentina, Australia, Canada and Mexico were also exempt from the aluminium tariffs.