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 British Zionist Federation; he worked with Arthur Balfour to obtain the milestone Balfour Declaration; A founder of so-called Synthetic Zionism, Weizmann supported grass-roots colonization efforts as well as high-level diplomatic activity. He was generally associated with the centrist General Zionists and later sided with neither Labour Zionism on the left nor Revisionist Zionism on the right. In 1917, he expressed his view of Zionism in the following words, Weizmann's personality became an issue but Weizmann had an international profile unlike his colleagues or any other British Zionist. He was President of EZF Executive Council. He was also criticized by Harry