South Korea's Constitutional Court to rule on President Yoon’s impeachment on Friday as tensions mount

South Korea’s Constitutional Court will rule Friday on whether to formally dismiss or reinstate impeached President Yoon Suk Yeol — a decision that either way will likely deepen domestic divisions.

The court has been deliberating Yoon’s political fate after he was impeached in December over his brief imposition of martial law that has triggered a massive political crisis.

Millions of people have rallied around the country to support or denounce Yoon. Police said they’ll mobilize all available personnel to preserve order and respond to acts of vandalism, arson and assault.

The Constitutional Court said in a brief statement Tuesday that it would issue its ruling at 11 a.m. Friday and that it will be broadcast live.

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The opposition-controlled liberal National Assembly voted to impeach Yoon soon after he imposed martial law Dec. 3. In addition to the Constitutional Court’s ruling on his impeachment, Yoon was indicted in January on criminal rebellion charges.

If the Constitutional Court removes Yoon from office, South Korea must hold an election within two months for a new president. If the court overturns his impeachment, Yoon would immediately return to his presidential duties.

At the heart of the matter is Yoon’s decision to send hundreds of troops and police officers to the National Assembly after imposing martial law. Yoon has insisted that he aimed to maintain order, but some military and military officials testified Yoon ordered them to drag out lawmakers to frustrate a floor vote on his decree and detain his political opponents.

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Yoon argues that he didn’t intend to maintain martial law for long, and he only wanted to highlight what he called the “wickedness” of the main liberal opposition Democratic Party, which obstructed his agenda, impeached senior officials and slashed his budget bill. During his martial law announcement, he called the assembly “a den of criminals” and “anti-state forces.”

By law, a president has the right to declare martial law in wartime or other emergency situations, but the Democratic Party and its supporters say South Korea wasn’t in such a situation.

The impeachment motion accused Yoon of suppressing National Assembly activities, attempting to detain politicians and others and undermining peace in violation of the constitution and other laws. Yoon has said he had no intention of disrupting National Assembly operations and detaining anyone.

Martial law lasted only six hours because lawmakers managed to enter the assembly and vote to strike down his decree unanimously. No violence erupted, but live TV footage showing armed soldiers arriving at the assembly invoked painful memories of past military-backed dictatorships. It was the first time for South Korea to be placed under martial law since 1980.

Earlier public surveys showed a majority of South Koreans supported Yoon’s impeachment. But after his impeachment, pro-Yoon rallies have grown sharply, with many conservatives fed up with what they call the Democratic Party’s excessive offensive on the already embattled Yoon administration.

Yoon was released from prison March 8, after a Seoul district court cancelled his arrest and allowed him to stand his criminal trial without being detained. Ten top military and police officials have also been arrested and indicted over their roles in the martial law enactment.