Trump admin revokes Brazilian ambassador's visa in escalating diplomatic feud

"We communicated continually with the Brazilian government for weeks and have given the Brazilian government every opportunity to do the right thing, yet they have continually delayed and obfuscated," a State Department spokesperson told Fox News Digital.

The spokesperson said Brazilian Ambassador Maria Luiza Ribeiro Viotti has not been declared persona non grata. However, she would have to reapply for a visa if she leaves the U.S.

"This is a reciprocal action," the spokesperson said, adding that further diplomatic measures remain possible if Brazil continues to delay or refuses to approve Perez.

The State Department said the pair planned a routine visit to Brazil focused on election integrity, religious freedom and freedom of expression, rejecting claims that they had intended to criticize Lula or the election process.

President Luiz Inácio Lula da Silva is set to face Sen. Flávio Bolsonaro, the son of former President Jair Bolsonaro, in the Oct. 4 election, according to The Associated Press.

The Associated Press contributed to this report.