The impeachment of South Korea’s acting President Han Duck-soo has plunged the country into further political turmoil, coming less than two weeks after lawmakers impeached President Yoon Suk Yeol.

When South Korea's acting President Choi Sang-mok arrived at the scene of the deadliest air disaster on the country's soil on Sunday, he had been on the job for less than 48 hours. Choi, the country's finance minister,

SEOUL—South Korea’s legislature voted to impeach acting President Han Duck-soo on Friday after he declined to make judicial appointments needed to advance the impeachment of his predecessor, extending the political upheaval that began with a short-lived martial law declaration earlier this month.