In May 1960, a growing nationalist movement, the Mouvement National Congolais (MNC) led by Patrice Lumumba, won the parliamentary elections. Patrice Lumumba became the first Prime Minister of the Democratic Republic of the Congo, then known as the Republic of the Congo, on 24 June 1960. The parliament elected Joseph Kasavubu as President, of the Alliance des Bakongo (ABAKO) party. Other parties that emerged included the Parti Solidaire Africain (PSA) led by Antoine Gizenga, and the Parti National du Peuple (PNP) led by Albert Delvaux and Laurent Mbariko.