The impeachment of Han Duck-soo, acting president since Yoon was impeached on Dec. 14 for declaring martial law, has thrown South Korea's once-vibrant democratic success story into uncharted territory.

South Korea's opposition-controlled National Assembly voted to impeach acting President Han Duck-soo despite vehement protests by governing party lawmakers, further deepening the country's political crisis.

South Korea's opposition-controlled National Assembly has voted to impeach the country's acting leader, Han Duck-soo. The assembly approved the impeachment motion in a 192-0 vote on Friday. Governing party lawmakers boycotted the vote.