Brazil's October 4 election pits multilateralist Lula against Bolsonaro's son in geopolitical showdown

Brazil will vote on October 4, and the choice before the country is stark: whether to remain a voice for the Global South speaking its own mind, or to align itself more tightly with Washington's vision for the region. The two front-runners are nearly tied in polls. One is Luiz Inacio Lula da Silva, the incumbent president who has spent his time in office arguing that Brazil answers to no one. The other is Flavio Bolsonaro, the eldest son of former President Jair Bolsonaro, who represents a very different worldview—one that sees Brazil's future bound up with the United States and its interests in the hemisphere.

Lula made his position unmistakable at the UN General Assembly in New York this week. "Brazil does not belong in anyone's backyard," he said, a remark aimed squarely at Donald Trump, even though the US president was not present to hear it. The comment was not abstract. Trump has repeatedly inserted himself into Brazilian politics, backing Bolsonaro and the far-right opposition. In July, Trump imposed sanctions on a Brazilian judge who convicted Bolsonaro of attempting a coup and sentenced him to 27 years in prison. The sanctions were only lifted after negotiations between Washington and Lula's government. This is the texture of the relationship: pressure, resistance, negotiation.

Flavio Bolsonaro's candidacy represents something larger than one man's ambitions. Across South America, the political ground has shifted. Argentina, Bolivia, Peru, Chile, Ecuador, and Colombia all now have governments aligned with Trump. Venezuela, since January, operates under what some observers describe as US oversight. Brazil, under Lula, stands as one of the last remaining leftist governments in the region—a position that has made it a focal point for international attention. The country is the world's fifth largest, an agricultural powerhouse, and sits atop vast reserves of rare earth elements, fresh water, and crude oil. What Brazil does matters far beyond its borders.

Flavio Bolsonaro wants to bring Brazil into closer alignment with the United States and away from China, which has long been Brazil's most important trading partner. He favors a conservative alliance with Washington and other right-wing governments. Lula, by contrast, practices what he calls multilateralist diplomacy—engaging in dialogue and trade with all comers, regardless of ideology. The Trump administration is pursuing what it calls the Shield of the Americas, an initiative framed around combating violent cartels but aimed at establishing economic and military dominance across South America while countering Chinese influence.

Experts who study Brazilian foreign policy offer a more complicated picture than campaign rhetoric suggests. Leonardo Paz, an analyst at the Brazilian Fundacao Getulio Vargas think tank, told Deutsche Welle that Lula has managed a largely normal relationship with Trump despite initial friction. Both men are 80 years old, and they have gotten along reasonably well, even as Lula has resisted Trump's pressure. If Flavio Bolsonaro wins, Paz said, the 45-year-old would be more inclined to accommodate the US president. His father made significant concessions during his 2019-2023 presidency. Brazil agreed to surrender its "developing country status" in World Trade Organization talks in exchange for a US promise to support its bid for OECD membership—a promise that never materialized. Trump also dangled the possibility of NATO "privileges" for Brazil, another commitment that came to nothing.

Rubens Ricupero, a former Brazilian diplomat and minister, emphasized the gap between the two candidates in foreign policy experience. "While relations with the US would continue as they are with Lula, it is completely unclear what a Flavio Bolsonaro presidency would mean," Ricupero said. "Lula has prestige in foreign policy, while Bolsonaro is completely inexperienced." A Bolsonaro victory would almost certainly threaten Brazil's membership in BRICS, the alliance of Brazil, Russia, India, China, South Africa, and five other nations. Flavio has said he would review Brazil's participation, arguing that BRICS exists only to provoke the United States. He has also criticized China's efforts to reduce the global dominance of the US dollar.

How serious such rhetoric would prove in office remains uncertain. Javier Milei, Argentina's current president, spoke harshly about China before taking power but quickly softened his tone once in office, unwilling to jeopardize Chinese loans. Paz predicted that if Bolsonaro won, political relations with China would cool but economic ties would likely endure, particularly because Brazil's agricultural sector depends heavily on Chinese markets. The Bolsonaro family draws its strongest support from rural regions that profit substantially from trade with China. "The unknown factor with Flavio Bolsonaro is how much pressure the US would exert so that Brazil distanced itself from China and to what extent he would yield to the pressure," Paz said.

Lula's tenure has positioned Brazil as a major voice in debates over global governance, raising issues around trade, climate policy, and development. He appointed Marina Silva, a leading environmentalist, as environment minister—a choice that signaled his commitment to ecological challenges. Ricupero worried that a Bolsonaro presidency would repeat the mistakes of Jair Bolsonaro's term, when Brazil dismantled major environmental policies and became increasingly isolated. Relations with the European Union suffered particularly; a trade agreement between Mercosur and the EU was frozen and only recently signed this year. The election on October 4 will determine not just Brazil's direction but the shape of South American politics for years to come.