Brazilian President Luiz Inácio Lula da Silva said Thursday that his government has not been successful in trying to negotiate the 50% tariff on Brazilian imports that U.S. President Donald Trump has threatened to impose.

U.S. President Donald Trump’s tariff threat against Brazil has sparked political turmoil. Trump linked a 50% import tax to the trial of his ally, Brazil's former President Jair Bolsonaro, calling it a “witch hunt.

Brazil’s President forcefully rebuked Trump after the U.S. leader called the prosecution of Lula’s predecessor, Bolsonaro, a “witch hunt” and hiked tariffs on the Latin American nation.