민주정의당
On 22 January 1990, two opposition leaders Kim Young-Sam and Kim Jong-Pil led their parties to merge into the ruling party Democratic Justice Party, and formed the Democratic Liberal Party, led by President Roh Tae-woo. Before they merged, Roh's party did not have a majority in the National Assembly. After they merged, they had over a two-thirds majority, which could pass bills without any obstruction from the opposition.