As the president awaits an impeachment trial, the country’s interim leader may, too, be ousted. The currency has plunged as the crisis has deepened.

Prime Minister Han Duck-soo, who became South Korea's acting president after Yoon Suk Yeol's impeachment, is a career technocrat whose wide-ranging experience and reputation for rationality may not be enough to stem the country's deepening political crisis.

The opposition-controlled National Assembly is poised to vote Friday on an impeachment motion against acting President Han Duck-soo over his refusal to appoint Constitutional Court justices that will adjudicate President Yoon's impeachment trial.