US President Donald Trump has imposed a steep 50 percent tariff on all Brazilian imports, triggering a diplomatic row with President Luiz Inácio Lula da Silva, who vowed to retaliate and warned against “tutelage.

President Donald Trump announced Wednesday he planned to hit Brazil with a 50% tariff, in part because of the treatment of its former president Jair Bolsonaro, his political ally.

That is the highest levy announced so far in Trump’s letters to world leaders this week, and comes after he wrote a lengthy message supporting the former Brazilian leader.