The Trump administration has revoked the visa of Brazil's ambassador to the United States, Maria Luiza Ribeiro Viotti, escalating a diplomatic rift between the two nations. A senior State Department official clarified that the revocation does not constitute declaring Viotti "persona non grata" and is not equivalent to expulsion. Instead, the official described it as a "reciprocal action" in response to Brazil's delay in granting diplomatic approval, known as agrément, to the US pick for ambassador to Brazil, Daniel Perez.