by Cosimo Graziani
Brasilia/Buenos Aires – In recent days, a diplomatic crisis has strained relations between Argentina and Brazil.
It all began when Argentine President Javier Milei described his Brazilian counterpart, Luiz Inácio Lula da Silva, as a “thief” and a “convict” in a television interview. The remarks prompted an immediate reaction from the Brazilian government, which recalled its ambassador toBuenos Aires, leaving only a chargé d’affaires as Brazil’s representative in the Argentine capital.
The crisis is unfolding against the backdrop of the campaign for Brazil’s presidential election, which will be held next year. In recent weeks, Milei attended the launch of the campaign of Flavio Bolsonaro, son of former president Jair Bolsonaro, who is currently in prison on charges related to an alleged coup attempt following the assault on the Congress building in January 2023. Flavio Bolsonaro is expected to run for president against Lula in what promises to be a highly polarized election in the South American giant.
Lula described Milei’s remarks as “foreign interference” and defended the diplomatic move, arguing that Brazil must be “treated with respect.”
The diplomatic crisis is part of a broader conflict unfolding across South America and throughout the Western Hemisphere. Brazil, together with Mexico, remains one of the last major Latin American countries governed by a left-wing administration. In recent years, South America and Central America have witnessed a succession of electoral victories for right-wing and center-right parties. Brazil stands out as an exception: in 2023, a left-wing leader returned to power, the same year Milei was sworn in as Argentina’s president. Now, as Brazil heads toward a new electoral campaign, the victory of one candidate or the other could change not only Brasília’s political orientation, but also determine whether a trend that began years ago will be consolidated or reversed. What is at stake is not only the government of Brazil, but also the political alignment of an entire continent.
The geopolitical consequences could be enormous, above all in terms of a total alignment with the United States. Milei and Lula represent opposite ends of the spectrum when it comes to international policy. While Milei is aligned with U.S. President Donald Trump on many international issues, sharing his criticism of international organizations such as the United Nations, Lula has pursued for years an agenda centered on multilateralism, in which international organizations play a key role in relations between states.
A continent broadly aligned with Trump’s United States would strengthen this political vision on the international stage, facilitating the implementation of what has been described as the “Trump Corollary” of the Monroe Doctrine in the Western Hemisphere.
There are also significant economic differences. In recent years, Argentina has moved closer to the United States in terms of investment in key sectors such as artificial intelligence. The government in Buenos Aires has developed significant ties with major U.S. companies in the sector, which are enjoying a period of strong growth under the Trump administration. Argentina has recently introduced legislation favorable to these companies, based on deregulation, while investments in Brazil have so far largely retained a state-led character.
Should Flavio Bolsonaro win next year’s election, similar policies could be adopted in Brazil, potentially opening up a vast new market for U.S. companies.

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