President Yoon’s brief martial law declaration and subsequent impeachment trial have deeply divided South Korea, a key U.S. ally.

The ruling caps months of political turmoil that have overshadowed efforts to deal with the new administration of U.S. President Donald Trump at a time of slowing growth.

South Korea's impeached president Yoon Suk Yeol has been ousted from office by the country's constitutional court. Yoon was impeached over his imposition of martial law on Dec. 3 in a surprise late-night broadcast where he declared martial law in South Korea,