The most consequential election in Colombia in a generation has become a diplomatic flashpoint, with outgoing president Gustavo Petro accusing his US and Italian counterparts of meddling after both Donald Trump and Giorgia Meloni endorsed the right-wing candidate, Abelardo de la Espriella, days before the June 21 runoff. Speaking in Montería, Petro railed against Trump for backing a man he called a “criminal,” claiming a prior agreement of non-intervention had been broken [A1]. He reserved equal vitriol for Meloni, invoking Garibaldi’s red shirts and Italy’s anti-fascist legacy to frame the contest as one between Mussolini’s heirs and partisans [A12]. The row comes as Petro prepares to address the UN Security Council on drug trafficking, adding a layer of international drama to an already fraught vote [A1].

At home, the campaign is mired in procedural disputes and tactical manoeuvring. De la Espriella, a lawyer with close ties to Florida senator Marco Rubio and Israeli hardliners, has refused to agree to debate rules demanded by his rival, Iván Cepeda, the leftist senator handpicked by Petro [A3][A6]. Cepeda insists on minimum standards for televised encounters; de la Espriella, whose digital-first strategy proved successful in the first round, dismisses this as evasion [A5][A9]. The Liberal Party, once dominant, has offered lukewarm, largely symbolic backing to de la Espriella’s platform despite his public rejection of the party’s support, exposing the deep fragmentation of Colombia’s traditional political class [A4][A13].

The stakes extend far beyond electoral arithmetic. De la Espriella has denounced peace negotiations with armed groups as futile, advocating instead for a military solution in concert with Washington and Israel [A8]. Cepeda, by contrast, is an architect of the 2016 peace accord with the FARC and a vocal defender of indigenous and environmental rights. The outcome could determine the fate of the Amazon rainforest—the target of expanded fossil fuel exploration under a conservative government, say environmental analysts—and the future of the landmark 1991 constitution, which both sides claim to defend [A11][A4][A10].

With over 41 million Colombians eligible to vote, electoral authorities are hastily fortifying the process. Witness registration closes on 12 June for overseas ballots, and the National Electoral Council has begun accrediting monitors for a vote that international observers describe as remarkably well-organised despite the toxic political climate [A2][A7]. The candidates, meanwhile, are overhauling their campaign machinery: Cepeda leans on a ground mobilisation network inherited from Petro, while de la Espriella floods social media platforms with anti-establishment messaging [A5][A13].

As the country braces for a second round that one diplomat in Bogotá calls “a referendum on Petro’s legacy,” the election has become a proxy for competing visions of Latin America’s role in the world—one aligned with the populist right in the US and Europe, the other championing an autonomous, environmentalist and socially progressive path. The result will reverberate from the slums of Cali to the summit of the Andes and, as the UN meeting demonstrates, far beyond Colombia’s borders.