"We cannot accept interference," leftist President Luiz Inácio Lula da Silva said in an interview Wednesday, a day after the United States announced it had revoked the visa of Brazil's ambassador. Meanwhile, Brazil this week recalled its ambassador and downgraded diplomatic ties with Buenos Aires after repeated insults from Argentina's President Javier Milei, who said Lula was "a thief" and "corrupt." Brazil demands 'respect'Lula, 80, has made national sovereignty a key theme of his campaign for a fourth term in office. Washington said it revoked the visa of Brazil's ambassador because Brasília had not yet approved its appointment of Daniel Perez, a prominent Florida Republican, as its ambassador to Brazil. "The United States doesn't attach importance to the Embassy in Brazil.