South Korea’s main opposition party will introduce a bill to impeach acting President Han Duck-soo on Thursday and hold a vote on Friday, potentially deepening the country’s constitutional crisis triggered by a short-lived martial law. The opposition Democratic Party had threatened to impeach Han if he did not immediately appoint three justices to fill vacancies at the Constitutional Court. Parliament voted in favor of three nominees on Thursday,

The court is trying to impeach President Yoon Suk Yeol for declaring martial law on December 3. “It has become clear that Prime Minister and acting President Han Duck-soo does not have the qualification or the will to safeguard the Constitution,” Democratic Party floor leader Park Chan-dae said in a statement. The resolution was introduced in parliament on Thursday and must be voted on within 24 to 72 hours. It highlighted a variety of Han’s actions as grounds for impeachment, including his veto of a special prosecutor bill investigating the first lady’s alleged wrongdoings. If Han is impeached, the finance minister will become the acting president.