SEOUL, South Korea — South Korea’s Constitutional Court removed impeached President Yoon Suk Yeol from office on Friday, ending his tumultuous presidency and setting up an election to find a new leader, four months after he threw South Korean politics into turmoil with an ill-fated declaration of martial law.

The unanimous verdict capped a dramatic fall for Yoon, a former star prosecutor who went from political novice to president in 2022, just a year after he entered politics.

In a nationally televised verdict, the court’s acting chief Moon Hyung-bae said the eight-member bench upheld Yoon’s impeachment because his martial law decree seriously violated the constitution and other laws.

“The defendant not only declared martial law, but also violated the constitution and laws by mobilizing military and police forces to obstruct the exercise of legislative authority,” Moon said, “Ultimately, the declaration of martial law in this case violated the substantive requirements for emergency martial law.”

“Given the grave negative impact on constitutional order and the significant ripple effects of the defendant’s violations, we find that the benefits of upholding the constitution by removing the defendant from office far outweigh the national losses from the removal of a president,” the justice concluded.

Protesters erupt in jubilation

At an anti-Yoon rally near the old royal palace that dominates downtown Seoul, people erupted into tears and danced when the verdict was announced. Two women wept as they hugged and an old man near them leapt to his feet and screamed with joy.

The crowd later began marching through Seoul streets. Some people were dressed in cute blue bear costumes, a protest mascot that uses the opposition’s colors.

An election will be held within two months to repalce Yoon, but a festering national divide over Yoon’s impeachment will likely continue and could complicate South Korea’s efforts to deal with President Donald Trump’s “America First” policies and North Korea’s expanding ties with Russia, observers say.

One of Yoon’s lawyers, Yoon Kap-keun, called the ruling “completely incomprehensible” and a “pure political decision,” but the former president did not immediately issue a statement. Yoon’s ruling People Power Party said it would accept the decision.

Prime Minister Han Duck-soo, the country’s acting leader, in a televised speech vowed to ensure “there are no gaps in national security and diplomacy” and maintain public safety and order. Han was appointed prime minister by Yoon and became acting leader when Yoon’s powers were suspended by impeachment.

“Respecting the will of our sovereign people, I will do my utmost to manage the next presidential election in accordance with the constitution and the law” Han had said.

Surveys show Lee Jae-myung, leader of the main liberal opposition Democratic Party, is the early favorite to win election to choose Yoon’s successor. Lee is facing trials for corruption and other charges.

Lee welcomed the ruling and credited the South Korean people for “protecting our democratic republic.”

“The courage of the people who stood in the face of guns, swords and tanks, along with the bravery of troops who refused to obey unjust orders, has led to this great revolution of light,” Lee said.