Members of the major opposition Democratic Party of Korea stage a rally calling for the impeachment of President Yoon Suk Yeol, in front of the National Assembly in Seoul, Dec. 13. Yonhap

With the opposition-led parliament set to vote on a second impeachment motion against President Yoon Suk Yeol on Saturday, the major opposition Democratic Party of Korea (DPK) called on the ruling People Power Party (PPP) to join the vote, warning any refusal would constitute "treason against the people."

"The only way to safeguard democracy and South Korea's future is by overwhelmingly passing the impeachment motion," DPK spokeswoman Hwang Jung-a said in a briefing.

"At this very moment, Yoon Suk Yeol, the mastermind of insurrection, is dreaming of his revival and deceiving the people. Obsessed with misguided beliefs, Yoon addressed the nation as though declaring war and is attempting to divide public opinion with fake news."

She also criticized Yoon for breaking his promise to step back by trying to appoint a new defense minister.

"We can no longer endure Yoon's madness," she said.

The National Assembly is set to vote on the second impeachment motion at 4 p.m. The first motion was scrapped last Saturday, with nearly all lawmakers from the PPP boycotting the vote. (Yonhap)