"The aftermath of Israel's invasion of Lebanon in 1982, and the attack on the Palestinian refugee camps by Lebanese Christians, left a moral stain on Israel. In the Knesset there was a demand for a thorough inquiry into the massacres and a clarification if Israel was in any way responsible. The left wing political parties were in favor of the inquiry. The right wing parties were opposed to it. Mizrachi joined them in opposing any inquiry. Rav Soloveitchik was informed of the position taken by Mizrachi. A vote was scheduled for a Sunday. The Rav called Rabbi Friedman at the Jewish Agency and instructed him to call Israel in his name and to demand that Mizrachi vote for the resolution. The Rav said that it is not a political issue but a moral one and Mizrachi had to act morally. So insistent was the Rav that he told Rabbi Friedman to call Israel on Shabbat to convey his message! The call was an halachic order by the Rav to Rabbi Friedman. The call was made on Shabbat. Mizrachi voted for the inquiry."
Orthodoxy Awakens, The Belkin Era and Yeshiva University, Victor Geller, p. 258