Chaim Weizmann institute was a global success attracting scientists from all over the Diaspora. In 1949 there were 20 researchers, twenty years later there were 400 and 500 students. The Honourable Chaim Weizmann met with United States President Harry Truman and worked to obtain the support of the United States, they discussed emigration, for the establishment of the State of Israel. The President lived at Rehovot, where he regularly received the Prime Minister David Ben-Gurion into his garden. He was denied any actualisation of the political role he had hoped for by the Left. He had to be consoled with the Weizmann
Chaim Weizmann was afraid of the rise of the Nazis. From 1933 there were year-on-year leaps in mass immigration by 50%. Prime Minister Ramsay MacDonald's attempted reassurance on economic grounds in a White Paper did little to stabilize Arab-Israeli relations. In 1936 Weizmann addressed the Peel Commission (set up by the returning Conservative Prime Minister Stanley Baldwin), whose job it was to consider the working of the British Mandate of Palestine. On 25 November 1936, testifying before the Peel Commission, Weizmann said that there were in Europe 6,000,000 Jews ... "for whom the world is divided into places where they cannot live