South Korea’s main opposition leader said it may be difficult to garner enough support from the ruling party to impeach President Yoon Suk Yeol this week over his declaration of martial law.

In an interview on Thursday, Democratic Party leader Lee Jae-myung said the situation remains in a "state of flux” ahead of a parliamentary vote set for the next few days on launching impeachment proceedings against Yoon. Whatever happens in the vote, he said he remains committed to removing the president.

While Lee’s party controls a majority in the legislative body, it needs a minimum of eight votes from Yoon’s People Power Party to move forward with the motion to oust the president.