The drumbeat is growing louder. Covert operations are supposed to remain just that, but on Wednesday Donald Trump confirmed that he had approved secret CIA actions in Venezuela and suggested that he was considering strikes on its territory. These comments follow the administration’s extrajudicial killings at sea: attacks on alleged drug boats in the Caribbean that have left at least 27 dead – a frightening new precedent denounced by UN experts as illegal. The US has already built up forces in the region, with about 6,500 troops now stationed there. “No to war in the Caribbean … No to regime change … No to coups d’état orchestrated by the CIA,” railed Nicolás Maduro, Venezuela’s dictator, after Mr Trump’s remarks.

The US president’s repeated claim that each boat strike saves 25,000 American lives is even more preposterous than it first sounds. The fentanyl that killed 48,000 people in the US last year did not come from Venezuela; most of........

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