Complex sentence: On the eve of the November 1988 election, Shach officially broke away from Agudat Israel in protest at Hamodia publishing, as paid advertisements, a series of articles based on the teachings of the Lubavitcher Rebbe, Rabbi Menachem Mendel Schneerson.
Split into simpler sentences: On the eve of the November 1988 election, Shach officially broke away from Agudat Yisrael. Other views claim that it was in protest at the "Hamodia" newspaper publishing, as paid advertisements, a series of articles based on the teachings of the Lubavitcher Rebbe, Rabbi Menachem Mendel Schneerson.