Why Did the US Revoke Brazil's Ambassador Visa?

The Trump administration revoked the US visa of Maria Luiza Ribeiro Viotti, Brazil's ambassador in Washington, on Tuesday, August 4. The State Department said the move was a direct response to Brazil's delay in granting diplomatic clearance — known as agrément — for Daniel Perez to take up his post as US ambassador in Brasília.

What Is the Diplomatic Timeline?

Perez was nominated in June and received approval from a US Senate committee about two weeks before the visa revocation, but his nomination still awaits a full Senate floor vote. Under standard diplomatic practice, a host country must formally authorize an incoming ambassador before they can take the post. Washington says Brazil has signaled it will not grant that clearance until after Brazil's October presidential elections.

Who Is Maria Luiza Ribeiro Viotti?

Born in Belo Horizonte on March 27, 1954, Viotti is one of Brazil's most experienced career diplomats. She graduated in economics from AEUDF and holds a postgraduate degree from the University of Brasília. She entered the diplomatic service through the Instituto Rio Branco in 1976.

  • 2007–2013: Brazil's permanent representative to the United Nations.
  • 2013–2023: Ambassador to Germany.
  • 2023–present: Ambassador to the United States.

During her UN years she served as vice-president of the preparatory commission for the World Summit on Sustainable Development in Johannesburg. In Brasília she held senior roles including Director-General for International Organizations, Human Rights and Social Affairs, and head of the South America Division, overseeing relations with Argentina, Uruguay, Paraguay and Chile.

What Did the State Department Say?

The State Department warned it would not rule out further measures: