later opposed President Park's power grab with the authoritarian Yushin Constitution of 1972. In 1971, Kim made his first attempt to run for president against Park as candidate for the opposition New Democratic Party, but Kim Dae-jung was selected as the candidate. New Democratic Party leader In 1974, he was elected as the president of the New Democratic Party. While he temporarily lost his power within the national assembly in 1976, Kim made a political comeback during the final year of Park Chung-hee's rule. Kim took a hardline policy of never compromising or cooperating with Park's Democratic Republican Party until the Yushin Constitution was repealed and boldly criticized Park's dictatorship, which could be punished with imprisonment under the new constitution. In August 1979, Kim allowed around 200 female workers at the Y.H. Trading Company to use the headquarters of New Democratic Party as a place for their sit-in demonstration and pledged to protect them. One thousand policemen raided the party headquarters and arrested the workers. One female worker died in the process and many lawmakers trying to protect them were severely beaten, some requiring hospitalization. The YH Incident garnered widespread criticism and led to Kim's condemnation, with an assertion that Park's dictatorship would soon collapse. After this incident, Park was determined to remove Kim from the political scene, like the imprisoned Kim Dae-jung, and instructed the South Korean Central Intelligence Agency (KCIA) to engineer such a move. In September 1979, a court order suspended Kim's presidency of the New Democratic Party. When Kim called on the United States to stop supporting Park's dictatorship in an interview with the New York Times, Park wanted to have Kim imprisoned while the Carter Administration, concerned over increasing human right violations, issued a strong warning not to persecute members of the opposition party. Kim was expelled from the National Assembly in October 1979, and the United States recalled its ambassador back to Washington, D.C., and all 66 lawmakers of the New Democratic Party resigned from the National Assembly. When it became known that the South Korean government was planning to accept the resignations selectively, uprisings broke out in Kim's hometown of Busan. It was the biggest demonstration since the Syngman Rhee presidency, and spread to nearby Masan and other cities, with students and citizens calling for an end to the dictatorship. The Bu-Ma Democratic Protests caused a crisis, and amidst this chaos Park Chung-hee