The estimates for the destruction of European Jewry grew throughout 1942 and 1943. Chaim Weizmann urged a re-evaluation of the Biltmore program in June 1943.[11] Chaim Weizmann’s earlier estimate of 25% destruction declared at the Biltmore conference now seemed wildly optimistic.[12] Rabbi Meyer Berlin leader of the Mizrahi Zionist party disagreed arguing that no one could know how many Jews would survive and how many would die.[11]