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Brazil · Argentine foreign policy · Geopolitical risk

Lula halts Bolsonarism: Milei loses a bet and Argentina faces a strategic dilemma

Lula’s re-election upsets the geopolitical expectations of Washington and Buenos Aires. Argentina’s challenge will be to rebuild an indispensable relationship without confusing the national interest with the government’s ideological preferences.

Author: Alejandro Taibi · Cut-off date: October 27, 2026

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Why it matters

Lula’s re-election, confirmed on 25 October, leaves Argentina facing a bilateral relationship that cannot depend on partisan affinities. Brazil is a central trading partner for Argentine industry, and Mercosur, gas integration with Vaca Muerta and the infrastructure projects of the Litoral all depend on that relationship.

Impact on national interests

The automotive industry, industrial exports, energy integration and the infrastructure of the River Plate Basin depend on a bilateral relationship that is currently going through diplomatic tension. Its deterioration would first affect Argentina’s negotiating capacity and then investment.

Someone else’s electoral defeat that may become a national problem

The re-election of Luiz Inácio Lula da Silva, confirmed on 25 October by Brazil’s Superior Electoral Court, represents a defeat for Washington’s expectations in South America.

The Brazilian president won 51.79% of valid votes against 48.21% for Flávio Bolsonaro, a candidate whose campaign had received the public backing of the Argentine president.

The result guarantees Lula’s continuity and places Milei before a reality that his regional strategy apparently did not contemplate as a desirable scenario. He will have to deal, for at least a year, with a government he has turned into an ideological enemy.

The matter is particularly delicate because these are not two countries without economic or territorial ties. Argentina and Brazil share borders, institutional commitments, production chains, commercial interests, infrastructure and a long history of strategic cooperation.

A confrontation between their presidents does not necessarily alter those ties. But when it becomes a sustained orientation of foreign policy, it can introduce uncertainty, block initiatives and reduce Argentina’s negotiating capacity.

The danger is that foreign policy stops responding to a rational assessment of national costs and benefits and becomes an extension of the president’s rhetorical battles.

A decision can be consistent with a ruler’s ideological convictions and, at the same time, harmful to the State he represents.

This distinction is the core of Argentina’s problem in the face of Lula’s victory.

The background: a confrontation that has already had diplomatic consequences

The hypothesis of an escalation does not arise solely from the Brazilian election result. There are concrete precedents.

In July 2026 Milei took part in political events in Brazil linked to Flávio Bolsonaro’s candidacy and made offensive remarks against Lula, his government and the Brazilian judiciary.

On 26 July Itamaraty announced the withdrawal of its ambassador in Buenos Aires, Julio Bitelli, in response to those statements.

This was therefore more than a verbal exchange without institutional consequences. The controversy reached the level of diplomatic representation.

The situation took on a new dimension on 27 October, when the Argentine presidential spokesman, Adrián Ravier, confirmed that the government would not issue official congratulations on Lula’s re-election.

The government’s explanation was explicit. There are real ideological differences and Milei has no intention of hiding them.

Yet diplomacy does not require ideological affinity. Formally acknowledging an election result does not imply approving the winner’s political programme.

It is a practice of institutional recognition and of preserving relations between States.

Taken in isolation, Argentina’s refusal could be read as a symbolic show of disagreement. Placed within a sequence of insults, partisan support and diplomatic deterioration, it takes on another meaning. It may signal a willingness to prolong the confrontation even after Brazilian voters settled the contest democratically.

Understanding the risk does not require attributing psychological motives to Milei. It is enough to note that his decisions express a divergent ranking of objectives that appears to prevail over the national interest, of which preserving the bilateral political relationship is part.

First danger: the erosion of Argentina’s negotiating capacity

The first possible consequence is diplomatic, but its effects can extend to practically every area of the bilateral relationship.

When two governments have political differences, they can preserve communication mechanisms to manage shared interests. This separation between ideological disagreement and institutional cooperation is a fundamental tool of foreign policy.

If those mechanisms weaken, ordinary problems become harder to solve.

Trade negotiations, regulatory disputes, border cooperation, connectivity, investment and infrastructure initiatives require stable counterparts and decision-making channels.

Difficulties do not necessarily appear as explicit sanctions.

They can show up as delays, postponements, lack of political impetus, reduced willingness to negotiate or an inability to resolve technical disagreements.

This mechanism is especially dangerous because costs can accumulate without producing a spectacular diplomatic episode.

A postponed investment, an energy negotiation that yields no results or a lost trade opportunity can hardly be attributed solely to a presidential insult. A sustained climate of mistrust, however, can become an additional risk factor.

Argentina, whose economy is smaller than Brazil’s, faces an obvious asymmetry. It has less capacity to absorb the costs of a deteriorated bilateral relationship.

The real risk is not that Brazil stops trading with Argentina overnight. It is that Argentina loses influence over Brazilian decisions that will continue to affect it.

Second danger: compromising Argentine industry for an ideological dispute

Brazil is one of the main destinations for Argentine exports and an especially important market for manufactured goods.

Between January and September 2026, Argentina exported approximately 9,778 million dollars to Brazil and imported 11,993 million, according to INDEC trade statistics.

Bilateral trade involves activities whose continuity depends on production decisions and investments planned several years ahead.

Among them are car assembly plants, auto-parts makers, metalworking and various manufacturing industries.

A deteriorated political relationship can affect that fabric in several ways. It can hinder regulatory and sectoral negotiations that require government coordination. It can introduce uncertainty about the future of production agreements and investments. And it can weaken Argentina’s capacity to defend its conditions of access to the Brazilian market against international competitors.

Brazil’s trade data for September 2026 recorded a year-on-year fall of 25.2% in its exports to Argentina. Cumulative bilateral trade from January to September also contracted according to Brazilian statistics.

Those results cannot automatically be attributed to the conflict between Milei and Lula. Activity levels, exchange rates, trade policies and demand in both countries all play a role.

But precisely because the economic relationship is under strain, adding diplomatic uncertainty is particularly inconvenient.

The threat does not necessarily consist of an embargo or direct trade retaliation, scenarios for which there is currently insufficient evidence.

It lies in the possibility that Argentine companies lose investment, production-integration or negotiating opportunities while their competitors take those spaces.

The ideological confrontation could end up shifting costs onto Argentine workers, industries and regions that take no part in it.

Third danger: frustrating a strategic energy opportunity

One of the most concrete risks lies in gas integration.

On 15 April 2026 Argentina’s Energy Secretariat reported that both countries had completed a technical report on infrastructure, interconnection and export alternatives for Argentine natural gas to Brazil.

The initiative identifies opportunities to link Vaca Muerta’s production with Brazilian industrial demand.

The project matters well beyond immediate trade.

The possibility of establishing long-term energy contracts, developing infrastructure and securing regional markets can help improve Argentina’s export position and expand the scale at which its gas resources are developed.

But energy investment requires predictability and regulatory cooperation.

The existence of technical agreements shows that the bilateral relationship retains working mechanisms even in an adverse political context.

It also reveals what is at stake.

A political escalation could delay investment decisions, hinder transport agreements or reduce the institutional backing needed to carry projects through.

There is no evidence that Brazil has cancelled those initiatives in retaliation for Milei’s remarks.

The risk is prospective. Political deterioration could reduce the capacity to realise strategic opportunities that have already been identified.

From the Argentine standpoint, turning the development of Vaca Muerta into a tool of regional insertion should take priority over sustaining presidential antagonisms.

Fourth danger: weakening Mercosur from a position of lesser relative power

Mercosur is another space vulnerable to a prolonged confrontation.

Its institutional structure, organised under the Protocol of Ouro Preto, establishes that the decisions of its main bodies must be adopted by consensus and with all member States present.

This principle prevents Brazil from unilaterally imposing decisions within the relevant institutional mechanisms.

But it also means that cooperation between the main partners is indispensable for moving forward on significant agreements.

A persistent bilateral conflict can block initiatives, hinder joint trade negotiations and reduce the bloc’s capacity to act vis-à-vis third countries.

Argentina could be trapped between two unfavourable alternatives: accepting negotiations with less influence, or contributing to the paralysis of a space that remains relevant for its industrial exports.

A deeper strategic question emerges at this point.

Milei appears to conceive convergence with the United States as a priority axis of foreign policy. Lula, by contrast, seeks to maintain a diversified insertion that includes ties with Washington, China, Europe and the BRICS.

If Argentina weakened its relationship with Brazil without obtaining equivalent economic and diplomatic advantages from its other international ties, it could reduce its effective margin of autonomy.

Proclaiming a privileged alliance with a power is not enough.

For that alliance to be beneficial it must translate into investment, markets, technology, financing or concrete guarantees.

Otherwise the country risks sacrificing structural relationships in exchange for political affinities that can change with foreign electoral cycles.

Fifth danger: leaving Argentina’s Litoral exposed

From a territorial perspective, the potential consequences are especially important for the Argentine provinces linked to the River Plate Basin.

Entre Ríos, Corrientes, Misiones and Santa Fe belong to an economic space whose functioning depends on trade flows, connectivity and the infrastructure decisions of neighbouring countries.

Border crossings, transport corridors and regional logistics require coordination between national administrations.

If the political relationship between Buenos Aires and Brasília continues to deteriorate, one possible consequence is a loss of momentum in infrastructure and territorial-integration projects.

The damage would not necessarily be distributed evenly.

Border territories and the productive activities most tied to the Brazilian market could prove especially sensitive.

In the case of Entre Ríos, the strategic dimension lies in its link with the River Plate Basin, the circulation networks of the Litoral and its potential insertion into corridors of regional scope.

A foreign policy that disregards these territorial factors in the name of an ideological confrontation can hardly be considered oriented towards the national interest.

Geography imposes relationships of interdependence that no partisan preference can eliminate.

Sixth danger: making Argentina a less reliable regional actor

Diplomatic credibility does not depend solely on compliance with treaties.

It is also built through the predictability of government behaviour.

Countries need to be able to anticipate reasonably how their counterparts will react to political differences, electoral changes and conflicts of interest.

When a head of State adopts confrontational positions towards ideologically adverse governments, other actors may perceive a higher political risk in dealing with that administration.

This does not necessarily mean that Argentina becomes isolated.

It means that some partners may prefer more cautious negotiations, less ambitious agreements or mechanisms that reduce their dependence on Argentine political commitments.

For a country that needs investment, financing, market access and technological cooperation, that loss of predictability is a relevant risk.

There is an additional difficulty. Subordinating foreign policy to personal affinities can lead to miscalculations when foreign governments change.

Milei’s bet on Flávio Bolsonaro offers an example.

If his bilateral strategy depended, even partially, on a Bolsonarist victory, the electoral defeat reveals a design vulnerability, that of having conditioned the relationship with a fundamental State on an uncertain partisan outcome.

A sound foreign policy should be able to sustain functional relationships under different governments.

Seventh danger: a verbal escalation with hard-to-control effects

Political confrontation has a potentially cumulative dynamic.

An insult provokes a response. That response can be used to justify a new provocation, and the controversy ends up acquiring a logic of its own.

In international relations, this mechanism becomes a problem when leaders find domestic incentives to sustain the confrontation.

Milei may obtain domestic political benefits by reaffirming his antagonism towards Lula.

The confrontation allows him to present himself to his supporters as a leader faithful to his ideological identity, willing to challenge governments he considers adversaries.

But personal political benefits are not necessarily national benefits.

If the confrontation raises a leader’s approval among his supporters while worsening his country’s negotiating prospects, a divergence appears between the electoral rationality of the ruler and the strategic rationality of the State.

This is one of the central risks of the current scenario.

Milei’s conduct may have a rational political explanation in terms of his electoral positioning and, at the same time, produce harmful consequences for Argentina.

The problem should therefore be analysed less as a supposed psychological irrationality than as a possible subordination of the State’s objectives to individual political incentives.

Eighth danger: drawing Argentina into Brazil’s internal conflicts

Milei’s participation in events supporting Flávio Bolsonaro adds a further dimension.

A foreign president may express political affinities, but by intervening openly in another country’s partisan disputes he takes on diplomatic risks.

The defeat of the candidate he backed does not eliminate those risks. It may prolong them if the foreign leader continues to become involved in internal controversies after the election.

In Brazil, Flávio Bolsonaro’s defeat took place amid strong political polarisation.

Argentina should avoid any conduct that could be interpreted as government intervention in controversies over the legitimacy of the result or over decisions of Brazilian institutions.

There is not enough evidence to state that the Argentine government has decided not to recognise the election.

However, the earlier public support for the defeated candidate, together with the subsequent refusal to congratulate the winner, calls for close attention to its next moves.

Buenos Aires’s strategic obligation is to maintain a relationship with the Brazilian State and its constitutional authorities, and to stay out of Brazil’s partisan disputes.

Three risk scenarios for Argentina

The evolution of the bilateral relationship will depend on the decisions of both governments.

Moderate-risk scenario: rhetorical confrontation with functional continuity. Milei maintains his criticism of Lula, but ministries, embassies and technical teams keep cooperation channels open. Tensions affect the political climate without substantially altering trade or strategic projects. This scenario is compatible with the evidence of technical cooperation that persists between the two countries.

High-risk scenario: institutional deterioration and lost opportunities. The insults continue, diplomatic relations are not normalised and trade or energy negotiations lose momentum. Argentina finds it harder to influence regional initiatives and to complete investment projects. Costs appear gradually and can be confused with other economic difficulties. This is the scenario that deserves the most preventive attention, because there is a plausible causal mechanism and concrete precedents of diplomatic deterioration.

Critical-risk scenario: open bilateral crisis. A new provocation, a particularly serious political intervention or an institutional controversy could trigger further diplomatic measures. In an extreme situation, cooperation mechanisms could be suspended, regulatory conflicts could arise or restrictions could affect shared projects. This outcome should not be presented as inevitable or as the most likely. Nor is there sufficient evidence today to forecast a generalised trade rupture or a military confrontation. Its importance lies in the fact that States must prevent even lower-probability scenarios when the potential consequences are high.

What should Argentina watch in the coming months?

To distinguish a rhetorical dispute from an actual strategic crisis, verifiable indicators need to be tracked.

These indicators would make it possible to assess whether presidential conduct remains rhetorical or begins to compromise material interests.

The absence of congratulations does not in itself prove a future economic crisis. But combined with the withdrawal of an ambassador and a record of public insults, it is a signal that must be incorporated into risk analysis.

The underlying question: the national interest cannot depend on presidential temperament

Lula’s re-election forces an uncomfortable question. Does Argentina have a state foreign policy, or are its international relations subordinated to the president’s ideological preferences and personal decisions?

The question is not a minor one.

A country with Argentina’s characteristics needs stability in its structural relationships, especially with its neighbours.

It may disagree with Brazil on trade, industrial policy, regional integration or international affairs. It may even hold firmly opposing positions.

But to do so effectively it needs negotiating capacity, information, institutions and strategic objectives.

Permanent confrontation is not in itself a demonstration of firmness.

On the contrary, it can express weakness when it replaces negotiation with gestures aimed at domestic political consumption.

A diplomacy oriented to the national interest must assess the results of its actions, not only the intensity of its statements.

The fact that Milei regards Lula as an ideological adversary does not justify compromising economic opportunities or needlessly damaging the relationship with Brazil.

Nor does it mean that Lula should receive Argentine concessions merely for defending a different political project.

Argentina must negotiate with Brazil from an autonomous position, defending its industry, its exports, its infrastructure and its capacity to decide.

And precisely for that reason it needs to prevent foreign policy from being captured by personal rivalries.

Conclusion: the defeat is not Argentina’s, unless Milei decides to make it so

Lula won the Brazilian election. Milei backed the defeated candidate.

That result does not, in itself, constitute a defeat for Argentina’s national interests.

It could even open opportunities to reach economic agreements with a Brazilian administration that already has negotiating experience and knowledge of the bilateral relationship.

But it could also deepen the diplomatic deterioration if the Argentine president responds to Lula’s victory with an escalation of insults, provocations or decisions that compromise cooperation.

The available evidence does not allow us to state that such an escalation will necessarily occur.

It does allow us to identify precedents that justify a warning.

Brazil has already withdrawn its ambassador in response to Argentine presidential remarks. Buenos Aires refused to issue institutional congratulations after the election result. The confrontation has therefore gone beyond mere doctrinal difference.

The greatest danger is that Milei interprets Lula’s victory as a personal political affront and acts accordingly from the Argentine presidency.

In that case, the problem would cease to be ideological and become institutional and strategic.

The consequences could reach trade negotiations, industrial investment, energy-integration projects, the functioning of Mercosur and Argentina’s capacity to build a diversified international insertion.

The country does not need to share Lula’s political orientation. It needs to deal with Brazil.

And that need derives from a geographical, economic and historical reality that no election result changes, far more than from ideological sympathies.

The real threat to Argentina lies in Milei, unable to separate his political battle from the responsibilities of the State, ending up making Argentines pay the cost of a defeat that does not belong to them.

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