South Korea's conservatives made another about-face on Saturday and reinstated their nominee, just hours after dropping him and reopening the nomination process as the divided party struggled for unity to challenge the liberal frontrunner in a presidential election four weeks away.

South Korea’s main conservative party has nominated former Labor Minister Kim Moon Soo as its presidential candidate.

South Korea’s embattled conservative party has taken the unprecedented step of nullifying its primary and replacing presidential candidate Kim Moon Soo with former Prime Minister Han Duck-soo just one