<h1>Unprecedented presidential runoff set after no candidate met 50% or 40%+10% threshold; centrist faces former right-wing president</h1> A presidential election failed to produce a winner under electoral-law thresholds (50% outright or 40% with a 10-point lead), triggering an unprecedented runoff on October 19 between a centrist lawmaker from a prominent political family and a right-wing former president, after they received roughly 32% and 26% of votes respectively. Candidates allied with the long-dominant ruling party were eliminated. The party's barred founder remains subject to a court ruling and an arrest warrant, and he urged supporters to cast null ballots - contributing to an unusually high 19% rate of invalid votes. Voting was largely peaceful with isolated incidents of violence.