The U.S. government revoked the visa of Brazil's ambassador to the United States on Aug. 4 after an alleged delay in Brasilia's confirmation of Daniel Perez as the U.S. ambassador to Brazil, Reuters reported Aug. 4. Separately, the Brazilian government dismissed the Argentine ambassador to Brasilia, downgrading bilateral relations after far-right Argentine President Javier Milei repeatedly attacked leftist Brazilian President Luiz Inacio Lula da Silva, g1 reported Aug. 4.