特朗普政府撤销了巴西驻美大使玛丽亚·路易莎·里贝罗·维奥蒂的签证 [2][3][5]。这一举措是对巴西拒绝批准美国驻巴西大使提名人选丹尼尔·佩雷斯 [3][5]，以及上月拒发签证给两名美国外交官的报复 [1][2][3][5]。据报道，巴西拒签的两名美国官员为民主、人权与劳工事务助理国务卿里利·巴恩斯及其高级助手，原计划于7月27日至30日访问巴西 [5]。
美国国务院将此举定性为对等回应 [4]。国务院发言人表示，美国政府已与巴西持续沟通数周，给了他们充分的机会，但巴西方面不断延迟和含糊其辞 [5]。如果巴西采取适当行动并接受特朗普的大使任命，该决定可以迅速撤销 [1][2][4]。需要说明的是，大使签证被撤销并不等同于驱逐出境，维奥蒂仍在美国但无有效签证 [2]。
巴西政府对美国此举提出严厉谴责。卢拉办公室声明指出："今天的决定不是孤立事件。这是对巴西进行蓄意升级敌对措施的一部分，出于意识形态原因。" [3][5] 巴西方面认为美国此举是干预其10月大选的敌对行为 [3]。据悉，巴西总统选举定于10月4日举行 [1][3][5]。此外，特朗普政府还对巴西商品征收最高37.5%的关税 [5]。
The Trump administration has revoked the visa of Brazil's ambassador to the United States, Maria Luisa Ribeiro Viotti, in retaliation for Brazil's refusal to approve the U.S. ambassador nominee and its rejection of visa applications from American officials [2][3][5]. The action, taken on August 4, 2026, stems from Brazil's refusal to issue visas to two State Department officials—Assistant Secretary for Democracy, Human Rights and Labor Riley Barnes and a senior aide—who had planned to visit from July 27-30 [5]. Additionally, Brazil has delayed approval of Daniel Perez, a Florida Republican and close ally of Secretary of State Marco Rubio, whom Trump nominated as ambassador to Brazil on June 1 [3][5].
The U.S. State Department characterized the visa revocation as a reciprocal response, with officials stating they had engaged in sustained communication with Brazil over weeks, providing ample opportunity for the country to take appropriate action [5]. An administration official noted that the measure could be quickly reversed if Brazil takes proper steps and accepts the Trump administration's ambassador nominee [1][4]. State Department officials emphasized that revoking the ambassador's visa does not constitute expulsion; Viotti remains in the United States but lacks valid visa status [2].
Brazil's government has strongly condemned the action as an escalation of hostile measures. The president's office stated: "Today's decision is not an isolated event. This is a deliberate escalation of hostile measures against Brazil, motivated by ideological reasons" [3][5]. Brazil had previously expressed suspicion that the planned visit by American officials was intended to interfere with the country's October presidential election [4]. The Trump administration has also imposed tariffs of up to 37.5 percent on Brazilian goods [5].