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Exclusive-US House Foreign Affairs Committee Chair warns of China role in Argentina contract bid

By Thomson Reuters May 21, 2026 | 9:14 AM

By Leila Miller and Maximilian Heath

BUENOS AIRES, May 21 (Reuters) – U.S. House Foreign Affairs Committee Chairman Rep. Brian Mast has warned U.S. Secretary of State Marco Rubio of “Chinese malign influence” in a bid for a major contract in Argentina, according to a letter seen by Reuters.

The April 23 letter concerns an ​auction for a 25-year contract to dredge and operate Argentina’s Parana River, a vital waterway for most ‌of the country’s agricultural exports, that Argentina estimates will reach $10 billion in investment.

The terms of the tender, which is in its final phase with a decision expected in the coming days, explicitly barred state-owned companies, preventing bids from Chinese firms.

But Mast alleged that China was attempting “to circumvent that choice through a private sector proxy.” There is “serious concern” that Jan De Nul, a Belgian dredging company vying for the contract, “maintains deep ‌and ​ongoing links to PRC state-owned entities” through Servimagnus, an Argentine firm that’s part ⁠of Jan De Nul’s consortium, the ⁠letter claimed.

Jan De Nul has managed the Parana waterway for decades and is competing for the contract against the Deme Group, whose consortium includes investment firm KKR & Co and U.S.-based Great Lakes Dredge & Dock Corp. In the bid’s point-score system, Jan De Nul has been ahead.

The Trump administration, a close ally of Argentina’s President Javier Milei, ​has expressed concern about Chinese influence in Latin America, including Argentina, where Beijing in March was its second-largest trading partner.

Awarding the contract to Jan De Nul “would be unacceptable and damaging to Argentina’s national security, America’s national security and our ⁠bilateral relationship,” the letter said.

China’s foreign ministry did not immediately respond ⁠to requests for comment.

In response to Reuters’ questions, Jan De Nul and Servimagnus called the ​claims of ties between the companies and Chinese capital during the bidding process “absolutely false and malicious,” and said that “there is no ​participation by Chinese companies, either as partners or as suppliers.”

Last Tuesday, Argentina’s National Ports and Navigation ‌Agency celebrated the culmination of the bid, calling it a process that had seen “strong multisectorial support.” In a statement, the agency said that the company and Deme have had partnerships with Chinese companies but “this is not grounds for disqualification.”

U.S. LOBBYING

About 80% of Argentina’s agricultural and agro-industrial exports leave the country via the Parana River, flowing from the Rosario agro-industrial hub and ⁠surrounding areas to the South Atlantic Ocean.

Deme’s consortium was approved by the U.S. Department of Commerce’s Advocacy Center, which helps companies pursuing foreign contracts, according to a person in contact with the consortium who requested anonymity.

The lobbying effort resulted in ⁠Milei adviser Santiago Caputo flying last week ‌to D.C. to meet with officials, including Mast, Michael Jensen, senior director for Western Hemisphere ⁠affairs on the National Security Council, and Alec Oxenford, Argentina’s ambassador to the U.S.

Caputo ​was told ‌that the U.S. had “grave concerns” about Chinese involvement in the bid, according to a ​person familiar ⁠with the visit. The person said the concerns stemmed partly from allegations of frequent contact between the Chinese embassy and Servimagnus’ office in Argentina.

The consortium, in a May 11 letter addressed to Jensen seen by Reuters, has also alleged “clear bias” against U.S.-backed investment, saying that the timeline for companies to present a technical offer was rushed and had benefited Jan De Nul.

Argentina’s anti-corruption prosecutors’ office has also signaled concern about “serious and obvious” procedural irregularities in the bidding process.

(Reporting by Leila Miller and Maximilian Heath; Editing by ​Christian Plumb and Nick Zieminski)