Chile Opposition Asks Watchdog to Rule on Kast’s US-Led Security Pact
CHILE · POLITICS
Key Facts
- —The country Chile, the world’s largest copper producer, has been governed since 11 March 2026 by José Antonio Kast, a hard-right president.
- —Why it matters On 22 September Kast made Chile a full member of a US-led coalition against organised crime without a vote in Congress.
- —What happened On Monday 28 September it emerged that five left-wing deputies had asked Chile’s comptroller-general to review whether joining was legal. They call the pact a disguised treaty.
- —Who is involved Interior Minister Claudio Alvarado says the text is a political declaration, not a treaty. On Sunday he told ex-presidents Bachelet and Boric to raise objections privately.
- —What it means for you Nothing changes yet for residents or investors. At stake is whether Congress gets a say over commitments touching copper and lithium supply chains.
- —Still open Whether the comptroller takes up the request. The Senate has called a special session on the pact for 7 October.
Five opposition deputies in Chile have asked the country’s comptroller-general to rule on whether joining the Shield of the Americas was legal. They call the US-led pact a treaty in disguise that President José Antonio Kast should have sent to Congress.
BioBio, a national radio network, and the news site Aurora Noticias reported the filing on Monday. It opens a legal front in a week-long row that has also drawn in two former presidents.
What the deputies are asking
The five are Communists Luis Cuello, Daniela Serrano and Irací Hassler, Socialist Juan Santana and Jaime Bassa of the Broad Front. They filed with the Contraloría General de la República, the independent office that checks whether government acts comply with the law.
They want a review of how Chile joined and of every annex and protocol behind the agreement, BioBio reported.
Their case rests on the Vienna Convention on the Law of Treaties, which judges an agreement by its substance, not its label. “The Shield of the Americas is a disguised international treaty,” Cuello said, according to BioBio.
The deputies point to clauses on intelligence sharing and on supply chains for critical minerals such as copper and lithium. They also object to the phrase “hemispheric sovereignty”, arguing that Chile’s constitution places sovereignty in the nation.
The government’s answer
Kast has said the pact is neither a treaty nor a basis for military operations, Aurora Noticias noted.
Claudio Alvarado, who serves as both interior minister and government spokesman, repeated that line on Sunday on the TVN programme Estado Nacional. “The document does not constitute a treaty; it does not establish legal obligations for Chile,” he said, BioBio reported.
He called it a political declaration of cooperation among 15 countries. Foreign troops on Chilean soil would still need Congress’s authorisation, he said, according to ADN Radio.
A rebuke for Bachelet and Boric
Alvarado also answered Michelle Bachelet and Gabriel Boric, who on 24 September asked Kast to reconsider membership.
Former presidents should “call, ask for a meeting and discuss these matters in private”, he said, as quoted by ADN Radio and BioBio.
He said the issue seemed to be used for domestic politics and, if so, hoped it had been “a misstep”, BioBio reported. The government was “always available to talk”, he said, but the former presidents should request the meeting.
What Is Not Yet Known
- Whether the comptroller’s office will take up the request, and how quickly.
- Whether the Foreign Ministry will release the annexes and protocols the deputies want.
- What Foreign Minister Francisco Pérez Mackenna tells deputies at his questioning on Monday afternoon.
- Whether Bachelet and Boric will seek the private meeting Alvarado proposed.
Sources: BioBioChile, 28 September 2026; Aurora Noticias, 28 September 2026; ADN Radio, 27 September 2026; BioBioChile, 27 September 2026; CNN Chile, 23 September 2026.
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