Kast and Jara advance to Chile's presidential runoff amid security concerns and AI disinformation

Chile's presidential race has narrowed to a stark choice. On December 14, voters will decide between Jeannette Jara, a leftist former labor minister, and José Antonio Kast, an ultraconservative firebrand. The first round, held in mid-November, delivered a compressed result: Jara took 26.85 percent of the vote, Kast claimed 23.93 percent, and both now face a runoff that will reshape the country's political direction.

The margin between them is thin enough that a third-place finisher could tip the balance. Franco Parisi, an economist who has built a following as an outsider critic of traditional parties, captured roughly 20 percent of votes—a stunning result that mirrors his surprise performance four years earlier. In 2021, Parisi finished third with 12.8 percent, and more than 60 percent of his supporters ultimately backed Boric in the runoff against Kast. The same calculus now looms: Parisi's voters will likely determine whether Jara or Kast reaches the presidency.

The campaign itself was shaped by a single dominant concern. Security—the rising tide of crime, gang violence, and border chaos—became the lens through which voters evaluated every candidate. Both left and right responded by proposing hardline measures: border closures, immediate deportation of undocumented migrants, military deployment. Kast framed his candidacy as a "government of emergency," a direct appeal to voters exhausted by disorder. Jara, meanwhile, chose a different strategy. Rather than defend the outgoing Boric administration, she distanced herself from it, hoping to escape the accumulated frustration with an incumbent whose approval rating had sunk to 33 percent. The tactic did not fully work. Jara's 26.85 percent fell short of the 30 percent threshold her own team had considered necessary to enter the runoff with real momentum.

Behind the visible campaign lay a darker current. This election marked the first time artificial intelligence was weaponized at scale in Chilean politics. Fabricated audio clips circulated widely, designed to deceive voters about candidates' positions and statements. Troll networks—coordinated accounts spreading false claims of electoral fraud—proliferated across social media, with one television director reportedly implicated in running such operations. TikTok became a primary vector for viral misinformation, reaching millions of younger voters with content that was often false but always designed to inflame. Election monitors and fact-checkers scrambled to keep pace with the volume and sophistication of the disinformation, but the genie was already loose.

The broader political landscape tells a story of sustained rightward drift. Over Boric's four-year presidency, the right grew exponentially, fueled by widespread anger over unfulfilled campaign promises—more than 80 percent of his pledges went unmet. The left's base fractured. The traditional center-right, represented by candidates Evelyn Matthei and Johannes Kaiser, together captured 27 percent of the first-round vote, but both have already signaled they will support Kast in the runoff, consolidating the right's advantage. Parisi's strong showing reflects something deeper: a significant portion of the electorate has lost faith in established parties altogether, whether left or right.

In her first statement after the results, Jara appealed to institutional pride and democratic resilience. "We are a great country," she said, pushing back against what she characterized as opposition attempts to paint Chile as failing. She warned voters not to let fear paralyze them, and called for security to be built through competent governance, not authoritarian shortcuts. She also issued a direct caution about protecting democracy itself. Kast, by contrast, framed the runoff as a referendum on whether to continue Boric's tenure or reject it outright. He thanked Matthei and Kaiser for their support, noting that while campaign disagreements had existed, they paled beside the shared concern about the country's direction.

The December 14 runoff will be decided by which candidate can claim the mantle of change more convincingly—and by where Parisi's voters ultimately cast their ballots. Jara must overcome the perception that she is tainted by association with an unpopular government. Kast must convince voters that his emergency-government rhetoric offers solutions rather than merely amplifying their fears. And both will compete in an information environment poisoned by AI-generated lies and coordinated disinformation campaigns, making it harder than ever for voters to know what is real.