South Korea’s opposition leader, Lee Jae-myung, issued a stark warning to ruling party lawmakers on Friday, urging them to back the impeachment of President Yoon Suk Yeol in a vote scheduled for Saturday. “History will remember and record your choice,” Lee said, as tensions escalate over Yoon’s controversial imposition of martial law.

Yoon’s brief declaration of martial law, the first in over 40 years, has plunged the country into political turmoil, with critics accusing him of “insurrectionary acts undermining the constitutional order.” An initial impeachment attempt last weekend failed when lawmakers from the ruling People Power Party (PPP) boycotted the motion. However, with mounting public outrage and intensified opposition efforts, analysts suggest the Democratic Party’s second attempt has a stronger chance of success.

The impeachment vote, set for 5:00 pm local time on Saturday, requires 200 votes to pass. While the opposition holds a majority, it still needs eight ruling party lawmakers to defect. As of Friday, seven PPP members had expressed support for impeachment, leaving the vote on a knife-edge.

If the motion passes, President Yoon will be suspended from office while the Constitutional Court deliberates his fate, with Prime Minister Han Duck-soo stepping in as interim leader. The court has 180 days to decide, and a unanimous decision would be required to uphold impeachment due to its current composition of six judges.

Yoon’s martial law declaration has sparked widespread protests across South Korea, with demonstrators demanding his resignation and prosecution. His approval rating has plummeted to a record-low 11%, according to Gallup Korea, while 75% of respondents now support his impeachment.

In a defiant televised address on Thursday, Yoon vowed to fight “until the very last minute,” accusing opposition lawmakers of colluding with communist adversaries. Meanwhile, protesters from all walks of life, from K-pop fans to blue-collar workers, have joined the growing movement to oust him.

“Impeachment is a must. We’re fighting for the restoration of democracy,” said Kim Sung-tae, a car parts worker. Another protester, teacher Kim Hwan-ii, voiced frustration, saying, “I’m so angry that we all have to pay the price for electing this president.”

If successful, Yoon would become only the second president in South Korean history to be impeached, following Park Geun-hye in 2017. However, even if the motion fails, legal experts argue Yoon could still face criminal charges for his martial law declaration.