South Korean Acting President Choi Sang-mok called for national harmony and unity and for trust in the government in a New Year's address on Tuesday, amid an unprecedented political crisis sparked by impeached President Yoon Suk Yeol's short-lived martial law declaration.

The vote was the second major impeachment in two weeks after President Yoon’s ill-fated martial law bid set off turmoil. The country’s currency has plunged.

South Korea's acting President Choi Sang-mok seeks to fill vacancies in the Constitutional Court, aiming to restore stability following political upheavals. Choi, who became acting leader after the impeachment of Prime Minister Han Duck-soo,

South Korea's acting President Choi Sang-mok said on Tuesday he would immediately move to fill vacancies on the Constitutional Court in a effort to restore stability after the impeachment of two of his predecessors this month triggered political turmoil.

The plane crash is the first major test for South Korea’s acting president, Choi Sang-mok, who was appointed the interim leader only on Friday, as the country grapples with a political crisis at the highest levels.

Acting President Han Duck Soo blocked the appointment of three judges that Parliament had selected to oversee his predecessor's impeachment.

Han Duck-soo declined to make judicial appointments needed to advance the impeachment of his predecessor.

South Korea's opposition-controlled National Assembly voted Friday to impeach acting President Han Duck-soo despite vehement protests by governing party lawmakers, further deepening the country's political crisis set off by President Yoon Suk Yeol's stunning imposition of martial law and ensuing impeachment.

STORY: South Korea's acting President Choi Sang-mok held an emergency meeting in Seoul on Sunday to discuss the country’s deadliest air disaster, just two days into his new job.:: Muan, South Korea “As the acting 'head of the government' responsible for the safety and lives of our residents,

South Korea's National Assembly impeached the country's acting president, Han Duck-soo, on Friday, marking the second time in December that it has chosen to remove the country's leader.

The fate of South Korean President Yoon Suk Yeol is in the hands of the country's Constitutional Court after parliament impeached him on Dec. 14 and suspended his powers over his short-lived martial law on Dec.