Impeachment of Yoon Suk Yeol

The impeachment of President Yoon Suk Yeol on December 14, 2024, marked a pivotal moment in South Korean political history. The National Assembly, by a vote of 204 to 96, passed an impeachment bill, fundamentally challenging the executive branch's authority. This drastic measure was a direct response to President Yoon's controversial declaration of martial law on December 3, 2024.

Martial law, a state of emergency where military authority supersedes civilian rule, is an extreme power rarely invoked in democratic nations due to its potential for abuse and its inherent threat to civil liberties. The declaration itself, without clear constitutional justification or broad consensus, immediately ignited widespread concern and opposition, setting the stage for the impeachment proceedings. Public opinion, already showing negative trends in 2024 polls, hardened significantly, with many South Koreans believing Yoon should either resign or face formal removal, underscoring the deep public dissatisfaction with his leadership and actions.

The immediate aftermath of Yoon Suk Yeol's impeachment triggered a complex series of leadership changes and constitutional reviews. Prime Minister Han Duck-soo assumed the role of acting president, a temporary measure designed to ensure governmental continuity. However, this period of transition was further complicated when Han Duck-soo himself faced impeachment on December 27, 2024. This second impeachment necessitated another shift in leadership, with First Deputy Prime Minister Choi Sang-mok stepping in as acting president.

The situation underscored the fragility of the political landscape during such a crisis. The ultimate arbiter of the impeachment was the Constitutional Court, which began its review of President Yoon's actions. The court's decision was crucial, not only for determining Yoon's fate but also for interpreting the boundaries of presidential power and the safeguards of the South Korean Constitution.

The prolonged period of acting presidencies highlighted the challenges of maintaining stable governance during a constitutional crisis.

On April 4, 2025, the Constitutional Court delivered a unanimous 8-0 decision, upholding the impeachment of President Yoon Suk Yeol and officially removing him from office. This decisive ruling validated the National Assembly's action and affirmed the severity of Yoon's constitutional violations. The court meticulously examined five major illegal acts attributed to the president.

These included egregious actions such as ordering the military and police to physically block lawmakers from entering the National Assembly, a direct assault on legislative independence. Furthermore, the court found that Yoon had illegally ordered the arrest of judges and Supreme Court justices, undermining the judiciary's crucial role as an independent check on power. The illegal declaration of martial law was also a central tenet of the court's decision.

These findings demonstrated a pattern of behavior that the court deemed incompatible with the fundamental principles of democratic governance and the rule of law enshrined in the Constitution.

Following the Constitutional Court's definitive ruling, the political landscape continued to shift. Han Duck-soo, having been acquitted by the court, resumed his role as acting president. However, this interim period was short-lived, as both Han Duck-soo and Choi Sang-mok resigned on May 1, 2025.

This led to Second Deputy Prime Minister Lee Ju-ho assuming the position of acting president. The Constitution mandates a snap election within 60 days of a president's removal, ensuring a swift return to democratic representation. Consequently, an election was held on June 3, 2025, resulting in the election of Lee Jae Myung as the new president of South Korea.

This entire process, from the declaration of martial law to the election of a successor, served as a stark reminder of the checks and balances within South Korea's democratic framework and the consequences of presidential overreach. The earlier failed impeachment motion on December 7, 2024, due to a lack of quorum caused by a boycott, also illustrated the deep political divisions and strategic maneuvering that characterized this period.