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South Korean President Yoon Suk Yeol delivers an address to the nation at his official residence in Seoul, South Korea, Dec 14, 2024. (Photo: The Presidential Office/Handout via Reuters)

VOInews, Soeul : South Korean President Yoon Suk Yeol vowed on Saturday (Dec 14) to fight for his political future after he was impeached in a second vote by the opposition-led parliament over his short-lived attempt to impose martial law, a move that had shocked the nation.

The Constitutional Court will decide whether to remove Yoon sometime in the next six months. If he is removed from office, a snap election will be called.

On a visit to Jordan, US Secretary of State Antony Blinken said South Korea has shown the strength of its democratic institutions after Yoon.

"I think the most important thing is that the Republic of Korea has demonstrated its democratic resilience," Blinken told reporters. "We've seen it follow a peaceful process laid out in its constitution, and we're ready to work with President Han as he assumes office."

Prime Minister Han Duck-soo, who was appointed by Yoon, became acting president while Yoon remains in office but with his presidential powers suspended halfway through his five-year term.

"I will give all my strength and efforts to stabilise the government," Han told reporters after the vote.

Later, he chaired a National Security Council meeting and urged the country to maintain a "watertight readiness posture" to ensure North Korea could not plan any provocations.

The political crisis, which has led to the resignation or arrest of several senior defence and military officials, has raised concerns over the South's ability to deter nuclear-armed North Korea at a time when Pyongyang is expanding its arsenal and deepening ties with Russia.

Yoon is the second conservative president in a row to be impeached in South Korea. Park Geun-hye was removed from office in 2017. Yoon survived a first impeachment vote last weekend, when his party largely boycotted the vote, depriving parliament of a quorum.

"Although I am stopping for now, the journey I have walked with the people over the past two and a half years toward the future must never come to a halt. I will never give up," Yoon said.

Considered a tough political survivor but increasingly isolated, he has been dogged by personal scandals and strife, an unyielding opposition and rifts within his own party.

Protesters near parliament backing Yoon's impeachment leapt for joy, waving colourful LED sticks as music pumped out. By contrast, a rally of Yoon supporters emptied following the news.

Opposition Democratic Party leader Lee Jae-myung urged protesters near parliament to fight together so Yoon is removed swiftly. "You, the people, made it. You are writing a new history," he told the jubilant crowds braving subfreezing temperatures.

The impeachment motion was carried as at least 12 members of Yoon's People Power Party joined the opposition parties, which control 192 seats in the 300-member national assembly, clearing the two-thirds threshold needed.

The number of lawmakers supporting impeachment was 204, with 85 against, three abstentions and eight invalid ballots.

The political crisis has sparked disarray in the ruling party, with its chief Han Dong-hoon defying calls to resign after backing impeachment as "inevitable to normalise the situation".

Yoon shocked the nation on Dec 3 when he gave the military sweeping emergency powers to root out what he called "anti-state forces" and overcome obstructionist political opponents.

He rescinded the declaration barely six hours later, after parliament defied troops and police to vote against the decree. But it plunged the country into a constitutional crisis and triggered widespread calls for him to step down on the grounds that he had broken the law.

Yoon later apologised but defended his decision and resisted calls to resign.

Opposition parties launched the fresh impeachment vote, supported by large demonstrations//CNA-VOI