The Rebbe's guidance on elections, government and public protest — above all in Eretz Yisrael:
Voting and a united religious front. Taking part in elections is an obligation (IK 3559). The Rebbe repeatedly urged the religious parties to set aside party interests and run as one united religious bloc, so that religious life and authentic Judaism would benefit (IK 1044, 3503, 9018); even a merely technical front is necessary, and requires strong public pressure and persistence (IK 9648). If elections cannot be avoided, the religious camp must be organized in time (IK 925). His position on the Knesset elections did not change, and the reasons he gave became even more relevant (IK 9767). Election campaigns should not deepen division; Shabbos is what unites Jews of every background (IK 7724). Promises a religious party makes must be kept, even though there are practical limits to enforcing them (IK 10799).
Religion and state. Separating religion from state is fundamentally incompatible with Jewish life, since Judaism unites spiritual ideals with daily material life, and Jewish identity is inseparable from Torah (IK 6881, 7542, 7515). The claim that religion is being mixed with politics ignores that anti-religious agendas are just as political (IK 4222).
Staying in government, and when to leave. Religious ministers should remain in government in order to uphold proper conversion law (IK 10316) — but if the grave omission in the conversion law is not corrected, they must leave the government (IK 9988). On Abba Eban's role and the registration question, see IK 10318; on why the Rebbe no longer spoke publicly against returning territories, IK 10120.
Protest and religious freedom. Government bodies must not legislate or interfere in shechita, which infringes religious freedom (IK 9094). A government-mandated "general religious and moral education" involving idolatrous elements is forbidden, and it is a halachic obligation to oppose it by lawful means (IK 9144). The Rebbe opposed convening a rabbinic conference in Jerusalem, following the stance of earlier Torah leaders (IK 9632), and had reservations about a world rabbinic assembly and synagogue conference (IK 9291).
See also: Land of Israel – Who is a Jew, conversion and public Shabbos; Land of Israel – Security and the wholeness of the Land; Leadership – Jewish unity and Ahavas Yisrael.