Brazil's October 4 presidential election pits incumbent Luiz Inacio Lula da Silva against Flavio Bolsonaro, eldest son of convicted former president Jair Bolsonaro, with polls showing them neck and neck in a potential runoff. The stakes extend far beyond Brasília. Brazil is the world's fifth largest country, an agricultural giant, and sits on rare earth elements, vast freshwater reserves, and enormous crude oil deposits. Whoever controls the presidency controls the alignment of those resources. Lula is, as DW puts it, the "last man standing" of the South American left. Argentina, Bolivia, Peru, Chile, Ecuador, and Colombia all now have governments sympathetic to Trump, and Venezuela has effectively become a US protectorate since January. Lula's foreign policy is multilateralist — dialogue and trade with everybody, with China as Brazil's most important trading partner. He used his UN General Assembly speech this week to declare that "Brazil does not belong in anyone's backyard." Flavio Bolsonaro represents a very different trajectory: conservative alignment with Washington and other right-wing states, with an explicit pledge to review Brazil's membership in BRICS. Trump has already interfered directly in Brazilian politics, imposing sanctions on the judge who convicted Jair Bolsonaro of attempting a coup and sentenced him to 27 years. Washington lifted those sanctions only after negotiating with Lula. The signal is clear — the US wants its preferred candidate in power. But the Bolsonaro alignment with Washington has a track record, and it's not flattering. During Jair Bolsonaro's 2019-2023 presidency, Brazil gave up its "developing country status" in WTO negotiations in exchange for a mere promise of US support for OECD membership. Trump also floated NATO "privileges" for Brazil. Neither materialized. Brazil traded concrete concessions for empty commitments. Analysts from the Fundação Getúlio Vargas and former diplomat Rubens Ricupero both note a structural limit on any Bolsonaro pivot: Brazil's agricultural heartland — the Bolsonaro family's core base — depends on Chinese demand. Jair Bolsonaro softened his anti-China rhetoric quickly in office, as did Argentina's Milei. The economic gravity is real. But the unknown, as analyst Leonardo Paz frames it, is how much pressure Washington would apply and how much Flavio would yield. The environmental dimension is where the election becomes a global story. Lula appointed leading environmentalist Marina Silva as environment minister. Jair Bolsonaro dismantled major environmental protections, froze the EU-Mercosur trade deal, and isolated Brazil diplomatically. Ricupero fears Flavio would repeat these mistakes. The Mercosur-EU deal was only signed earlier this year after Lula's restoration of environmental credibility. Despite its resource wealth, Brazil lacks the economic muscle to provide foreign aid or the military capacity to resolve conflicts, limiting its global influence. But under Lula it has become a protagonist in Global South debates on trade, climate, and governance reform. A Bolsonaro victory would trade that multilateral leverage for a subordinate position in Trump's hemispheric architecture — with no guarantee of reciprocal benefits, as Jair Bolsonaro's presidency demonstrated.