SEOUL, SOUTH KOREA — In late 2021, the wife of then-presidential candidate Yoon Suk Yeol appeared exasperated by several journalists she insisted were treating her husband unfairly. In a leaked phone call with a left-leaning reporter, Kim Keon-hee vowed to have “all of them” jailed if her husband won the presidency. The comment drew little attention, overshadowed by the scandals and mudslinging typical of South Korea’s elections. In hindsight, analysts say it hinted at how Yoon, now impeached and under investigation over his short-lived declaration of martial law, would later approach his critics as president. After taking office in May
