The unexpected imposition of martial law and the ensuing political upheaval drew concerns from allies in the U.S. and Europe who had seen Yoon as a partner in efforts to counter China, Russia and North Korea. U.S. and South Korean officials say more than ...

Trump's return to office raises uncertainty over U.S.-South Korea relations as political turmoil in Seoul challenges effective leadership and diplomacy.

South Korea’s parliament voted to impeach Prime Minister and acting President Han Duck-soo, less than two weeks after parliament stripped President Yoon Suk Yeol of his powers over his short-lived martial law order that plunged the country into political disarray.

Lawmakers from South Korea’s governing party protested on Friday against a vote to impeach the country’s acting president, Han Duck-soo. The motion, which passed 192-0, came less than two weeks after President Yoon Suk Yeol was also ousted by the opposition in the National Assembly.

South Korea’s parliament impeached Acting President Han Duck-soo, dealing another blow to a government already reeling after President Yoon Suk Yeol’s suspension less than two weeks ago for his brief martial law decree.

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.

The national assembly voted on December 27 to impeach acting president Han Duck Soo. Han has spent two weeks in the role, and is now suspended.

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.