Brazilian President Lula da Silva vowed to trigger Brazil's reciprocity law if negotiations with the U.S. fail.

Tarcísio de Freitas, governor of São Paulo state and a former infrastructure minister under Bolsonaro, told reporters Thursday that the U.S. tariffs would have a negative impact on the economy and for important industrial exporters from his state, including Brazilian plane maker Embraer.

Tensions between the United States and Brazil have suddenly burst open. Brazil’s president promised to reciprocate against President Trump’s tariffs.