Due to the stalemate produced by the elections, it was decided to form a national unity government, with the Alignment and Likud holding the leadership for two years each. The Alignment's Shimon Peres formed the twenty-first government on 13 September 1984. Alongside the Alignment and Likud, the coalition government included the National Religious Party, Agudat Yisrael, Shas, Morasha, Shinui and Ometz. Outside national unity governments formed during wartime, it was the largest-ever coalition in Israeli political history, with 97 MKs. In accordance with the rotation agreement, Peres resigned in 1986 and Likud's Yitzhak Shamir formed the twenty-second government on 20 October 1986. Shinui left the coalition on 26 May 1987. The eleventh Knesset also contained two controversial parties, Kach and the Progressive List for Peace. Kach was a far-right party that advocated the expulsion of most Israeli Arabs, and although it had run in previous elections, it had not passed the electoral threshold. Ultimately the party was banned after a law was passed barring parties that incited racism. The attempts made to stop Kach from competing in the next elections also affected the PLFP, as the addition of section 7a to the Basic Law dealing with the Knesset included the banning of parties that denied Israel's existence as a Jewish state: On this basis, the Central Elections Committee initially banned the PLFP from running for the 1988 elections, arguing that its policies promoted the scrapping of Israel as a Jewish state. However, the decision was eventually overturned by the Supreme Court of Israel, and the party was able to compete in the elections, winning one seat. Nevertheless, the law was not overturned, the Supreme Court merely deciding it was impossible to determine if "the real, central and active purpose is to bring about the elimination of the State of Israel as the state of the Jewish people", and attempts were made to ban the Israeli Arab parties Balad and Ta'al using the same law prior to the 2003 elections. During the Knesset term eight MKs left the Alignment; five to establish Mapam, Abdulwahab Darawshe to establish the Arab Democratic Party, Yossi Sarid defected to Ratz and Yitzhak Artzi to Shinui. The Alignment also gained three MKs when Yahad merged into it. Ometz and Tami merged into Likud. Mordechai Virshubski defected from Shinui to Ratz. Rafi Etain broke away from Tehiya to establish Tzomet. Haim Drukman defected from Morasha to the National Religious Party. Shimon Ben-Shlomo broke away from Shas to sit as an independent.
