Peter Lamelas, the Miami-raised U.S. ambassador to Argentina, is pushing the South American country to limit Chinese involvement in strategic industries, with a particular focus on a proposed Huawei data-center project tied to the Vaca Muerta shale fields in Neuquén province. Lamelas has warned that Chinese technology in telecommunications and infrastructure could expose sensitive data and scare off foreign investors, while Chinese officials and Huawei itself have rejected the allegations as baseless.
A Letter to a Local Utility Sparks a Diplomatic Dispute
According to the Miami Herald, Lamelas has focused much of his tenure on reducing Argentina's economic and technological dependence on China. That effort recently centered on Neuquén electricity distributor CALF, which has been weighing a technology agreement with Huawei. As reported by the Buenos Aires Times, Lamelas sent CALF a letter questioning its plans, arguing that “the involvement of Chinese companies in strategic sectors of the economy could hinder the arrival of new foreign investment.” He has also said that China requires companies to give the state access to any data passing through their technology and AI networks.
The proposed project would install a data center in Neuquén, but per Clarín, the agreement with Huawei had not yet been finalized. CALF has pushed back on the idea that the deal is settled or exclusively Chinese. The company told La Nación that the data-center contract had not been awarded and could go to Huawei, Vertiv or Schneider, noting that it is still weighing its options. “La red de CALF no es una red china. Es una red multiproveedor,” the utility said, meaning its network draws on U.S., European and Chinese suppliers alike, not a single country's technology.
Pressure Campaign Draws Scrutiny in Buenos Aires
The dispute escalated after CALF said the controversy began on July 12, when its technology manager received WhatsApp messages from U.S. Embassy economic-affairs attaché Andrew Dilts, according to UPI. U.S. officials have threatened to deny or revoke visas for CALF directors if the utility proceeds with the Huawei deal, the Buenos Aires Times reported, though the outcome of any such visa action has not been confirmed. Lamelas and CALF representatives later met on August 12 to discuss data security, telecommunications expansion in Vaca Muerta, and possible U.S. financing and equipment alternatives.
Lamelas was summoned to a congressional hearing in September 2026 over allegations that embassy officials pressured CALF to abandon the Huawei negotiations, but per the Miami Herald, he did not attend. He later said the embassy official's communications faithfully reflected U.S. policy, per UPI's reporting. The Miami Herald also reported that the U.S. Embassy in Argentina said it would report the paper's interview request to the appropriate authorities.
Beijing and Huawei Reject the Allegations
China's diplomatic mission in Argentina rejected Lamelas' remarks outright, describing them as steeped in ideological bias and rooted in a Cold War mentality, according to the Miami Herald. The Chinese Embassy separately called the allegations a “baseless accusation,” as reported by the Buenos Aires Herald. Huawei, for its part, described itself as a “100% private” company conducting business “under strict compliance” with the laws of the countries where it operates, and the Chinese Embassy said the firm had committed to signing a no-backdoor agreement along with third-party cybersecurity audits.
The Miami Herald reported that Lamelas has accused Huawei of spying for the Chinese Communist Party, framing the dispute as part of a broader push against what he has called adversarial powers, including Cuba, Venezuela, Nicaragua, China and Iran. He has said data security is national security for both countries, and that his mission is focused on pushing back against the Chinese Communist Party's influence in the region.
Vaca Muerta's Stakes and Argentina's Balancing Act
The fight over a single data-center contract carries outsized weight because of what's riding on Vaca Muerta. The shale formation's oil and gas development has accelerated under President Javier Milei, drawing fresh investment from U.S. drilling companies, according to the Buenos Aires Times. Expanding that production further will require new pipelines, port terminals, storage facilities and plants tied to liquefied natural gas exports, per Perfil — infrastructure that will need reliable telecommunications networks like the one CALF operates.
Yet Argentina's ties to China run deeper than one utility contract. China remains Argentina's main trading partner, and DatamarNews reported that Argentina's exports to China reached $4.89 billion in the first half of 2026, up 59.1 percent from the same period a year earlier — even as the country posted a $3.09 billion trade deficit with China over that stretch. China accounted for 9.9 percent of Argentina's exports and 22.5 percent of its imports in the same period, with electrical machinery and equipment the single largest import category.
Milei's government has also approved a $1.24 billion expansion of a lithium mine in Jujuy led by China's Ganfeng Lithium Group, which owns 47 percent of the project, according to Mining.com. Argentina has approved 16 projects under its RIGI investment regime worth nearly $30 billion combined, with 20 more proposals under review, even as Milei has forged closer diplomatic, trade and business ties with the White House and turned away from other global players, particularly BRICS members.
Washington's Broader Hemisphere Strategy
Analysts say the Huawei dispute fits into a wider U.S. push across the region. Fabián Calle, who heads the Institute for International Security and Strategic Affairs at the Argentine Council on Foreign Relations, described Lamelas' approach as a clear White House policy line, according to the Miami Herald. Calle said the U.S. strategy is to reinforce control over the hemisphere and that Washington is turning its effort to push China out of Argentina's strategic sectors into concrete action, pointing to deals and financing the U.S. has begun extending to Argentina.
Calle, also a senior fellow at Florida International University, identified 5G networks, the Paraná-Paraguay waterway, strategic ports, nuclear technology, weapons, artificial intelligence and rare earths as regional red lines for Washington. He also highlighted the close personal relationship between Milei and Lamelas as a factor shaping the policy, and said Lamelas' central mission is to hold back China's presence in the Southern Cone — a region that includes a strategic route connecting the Atlantic and Pacific oceans between Chile and Argentina toward Antarctica.
Lourdes Puente, an international relations and defense specialist who previously served as Argentina's director of national military strategic intelligence, framed the standoff as part of a larger contest. She said the U.S. and China are engaged in a power struggle over competition, and that Washington is seeking to prevent Beijing from gaining ground within its sphere of influence while promoting its own technologies as the alternative.
Underpinning the Pressure: Money and Legal Wins
The U.S. has backed its rhetoric with financial commitments. The United States and Argentina signed a swap agreement in 2025 providing up to $20 billion in liquidity support, and in February 2026 the two countries signed a bilateral trade agreement expanding U.S. market access for Argentine goods and strengthening critical-minerals trade, according to the Miami Herald. The Andes-Atlantic corridor is expected to channel $7 billion for energy, mining and infrastructure projects in Argentina through the U.S. Export-Import Bank.
Washington also secured a legal win tied to Argentina's finances: in March 2026, a divided U.S. appeals court struck down a $16.1 billion judgment against Argentina stemming from its seizure of oil company YPF, according to Reuters. Lamelas has described his own path — born in Cuba, raised in Miami after his family emigrated legally, and later founding MD Now Urgent Care into one of Florida's largest urgent-care networks — as the embodiment of the American dream, while criticizing Fidel Castro and the communist political system he says drove his family from Cuba.
Whether CALF ultimately signs with Huawei, Vertiv or Schneider remains unresolved, and the broader question of how far Argentina will tilt away from Chinese technology partners as it deepens ties with Washington is still playing out across the country's energy and telecommunications sectors.
