Chile's election of José Antonio Kast as president reinforces a renewed rightward shift across Latin America's major economies, accelerating the reversal of the left-leaning "pink tide" revival that swept the region in the early 2000s.

Kast, a hard-right conservative who defeated a left-wing candidate in the December 14 run-off, will take office in March 2026, ending four years of progressive rule under Gabriel Boric. His victory comes as conservative candidates lead polls ahead of presidential elections in Colombia and Peru next year, whilst Brazil's 2026 race could see an ally or close relative of former president Jair Bolsonaro challenge the left-wing incumbent.

The potential realignment would place several of South America's largest economies closer to Washington at a moment when President Donald Trump's second administration is pressing Latin American governments to align more closely on migration enforcement, public security and strategic competition with China — a push analysts describe as a revived Monroe Doctrine asserting US dominance over the Western Hemisphere. Yet the region's response has been decidedly uneven, shaped as much by domestic politics as by calculations about access to the American market and the kind of preferential trade treatment Trump has extended to select regional allies.

Rewards for alignment

In November, Washington struck framework trade agreements with four countries ruled by Trump-friendly leaders — Argentina, Ecuador, El Salvador and Guatemala — offering tariff relief on selected imports in exchange for dismantling non-tariff barriers and forgoing digital services taxes on US technology companies.

The accords grant tariff-free access for products not made domestically in the US, such as Ecuadorean bananas and coffee, while maintaining baseline levies of 10% on goods from El Salvador, Guatemala and Argentina, and 15% on Ecuadorean imports. The arrangements show Washington's willingness to reward political co-operation with economic incentives.

Chile's rightward tilt follows similar moves elsewhere in South America. Argentina's President Javier Milei, elected in late 2023 on a radical libertarian platform, has made restoring close ties with the US a cornerstone of his foreign policy whilst pushing market deregulation and fiscal austerity at home. Trump has rewarded this loyalty: in October, Treasury Secretary Scott Bessent finalised a $20bn currency swap line with Argentina's central bank to prop up the peso ahead of crucial midterm elections, which Milei eventually won in a landslide. Bessent described the intervention as a "bridge to the election", underscoring Washington's willingness to deploy substantial resources to support ideological allies.

In Bolivia, the election of centre-right president Rodrigo Paz Pereira in October ended nearly two decades of rule by the hard-left Movement for Socialism, opening the door to a cautious reset with a Washington eager to invest in the lithium-rich country.

Elsewhere, governments that blend conservatism with strong executive power have prioritised pragmatic co-operation. El Salvador's President Nayib Bukele, a Trump darling, has worked closely with the US on migration and security, even as international rights groups criticise his domestic policies and repressive apparatus, which have severely undermined the rule of law. In April, Bukele signed a controversial deal with Washington to host criminals deported from the US in his flagship CECOT mega-jail. Paraguay, governed by the conservative Colorado party, has maintained traditionally close diplomatic and military links with Washington, though public enthusiasm for US leadership has softened.

Leftist resistance

At the opposite end of the spectrum are left-leaning governments that have taken a more guarded or openly confrontational stance. Despite tensions linked to Trump's support for convicted former president Jair Bolsonaro — which led to Washington slapping 50% tariffs on Brazilian exports last August — Brazil's President Luiz Inácio Lula da Silva has sought to preserve working relations with the White House. Ties improved following a meeting in Malaysia, which paved the way for a gradual easing of the punitive tariffs. Yet the seasoned leftist leader has deepened economic and diplomatic engagement with China and other emerging powers through the BRICS trading bloc. Lula is also championing a free trade agreement between the Mercosur regional bloc and the European Union, framing Brazil's foreign policy around strategic autonomy.

In Colombia, relations with the US have become more strained under leftist President Gustavo Petro, elected in 2022 as the first leftist leader in the country’s recent history. Long a key US ally in the fight against drug trafficking, Colombia has challenged Washington's security-first approach and criticised US military strikes in the Caribbean targeting alleged drug-carrying vessels, arguing for a rethinking of anti-narcotics policy. In October, Petro was sanctioned by the US over his failure to curb drug trafficking, with Trump branding him an "illegal drug dealer". Bogotà hit back by suspending intelligence sharing with US agencies, though it later clarified that anti-narcotics co-operation would continue.

Mexico's left-wing government, now led by President Claudia Sheinbaum, has also faced pressure from Washington, particularly over migration, drug trafficking and water-sharing agreements. But despite occasional friction, Trump has praised Sheinbaum as "wonderful" and "brave", lauding her pragmatism, in marked contrast to his treatment of other regional leftists. The Mexican president has reciprocated, imposing tariffs on Chinese imports to address longstanding US accusations that Mexico had become a proxy route for Chinese goods entering the American market. Whilst the two neighbours remain deeply economically integrated through the USMCA trade agreement negotiated during Trump's first term and up for review next year, the relationship is a prime example of the transactional nature of his regional diplomacy.

Uruguay provides a softer example of left-wing governance. Since returning to power in 2025 under President Yamandú Orsi and the Broad Front, the country has combined progressive domestic policies with a traditionally pragmatic foreign policy. Successive governments in Montevideo have maintained steady, non-confrontational relations with Washington, prioritising trade and institutional continuity over ideological alignment.

Centrists and pragmatic balancers

Several countries occupy a more ambiguous middle ground. Ecuador's President Daniel Noboa, who presents himself as a conservative-leaning reformer, has combined tough security measures with a flexible foreign policy that keeps channels open to both Washington and Beijing, a balancing act that secured his country a place in the November tariff relief package. Peru, following the removal of disgraced former president Dina Boluarte earlier this year, is now governed by centre-right President José Jerí, whose administration has focused primarily on domestic stability whilst maintaining conventional ties with the US. The country, however, has significantly boosted ties with Beijing, which provides crucial investment for domestic infrastructure and has long become its largest trading partner.

In Central America and the Caribbean, political continuity has shaped foreign policy. Costa Rica and the Dominican Republic, both led by centre-left governments, have preserved constructive relations with Washington without embracing Trump's more confrontational rhetoric. Panama's conservative government of President Jose Raul Mulino has worked closely with the US on migration management, even as nationalist sensitivities persist around sovereignty issues, triggered by Trump’s threats to “take back” the Panama Canal over alleged Chinese interference in the waterway’s operations.

In Honduras, conservative Nasry Asfura, backed by Trump, holds a narrow lead in disputed elections. Trump warned of "serious consequences" if results were “changed” and pardoned former president Juan Orlando Hernández, Asfura's party ally who had been serving a 45-year sentence in the US for drug trafficking. Incumbent left-wing President Xiomara Castro has denounced the outcome as an "electoral coup".

Long-standing foes

Standing apart are Venezuela, Cuba and Nicaragua, where entrenched authoritarian governments remain at odds with Washington. Venezuela's President Nicolás Maduro, who last year claimed victory in a poll rejected as fraudulent by the opposition and several foreign governments, continues to denounce US sanctions and interference, even as military pressure from the White House intensifies dramatically.

In late November, Trump announced that US operations to combat Venezuelan drug trafficking "by land" would begin "very soon", escalating tensions amid a major American military build-up in the Caribbean. The USS Gerald R. Ford aircraft carrier arrived in Caribbean waters that month as part of what analysts describe as the region's largest American military presence in more than three decades, with the carrier strike group bringing total personnel to approximately 15,000.

The deployment forms part of "Southern Spear", an anti-narcotics initiative that has seen US forces conduct more than 20 strikes on alleged drug vessels since early September. Yet the assembled military presence substantially exceeds what would typically be required for counter-narcotics operations alone, leading many defence analysts to suggest the true aim may be regime change.

Maduro, subject to a $50mn US bounty on drug trafficking charges, has reached out for help to Russia and China, vowing resistance to any American attempts to remove him from power. Trump has indicated he remains open to diplomatic talks, suggesting a possible avenue for a peaceful exit for the Venezuelan autocrat, despite the military pressure.

Communist-run Cuba, under strict US sanctions since the 1960s revolution led by Fidel Castro, and Nicaragua, ruled by the marital dictatorship of President Daniel Ortega and his wife Rosario Murillo, have similarly resisted US pressure, tightening political controls at home whilst strengthening ties with anti-Western powers such as Russia and China.

A divided hemisphere

As of late 2025, Latin America presents a split ideological picture: roughly seven governments lean left, eight are conservative or centre-right, whilst three authoritarian regimes sit outside the conventional democratic spectrum.

For Trump's administration, the result is a hemisphere defined less by blocs than by a patchwork of co-operation, tension and selective engagement, with trade incentives deployed strategically to reward alignment and punitive measures such as sanctions and tariffs wielded against outliers.