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 wholly separated and the newly conceived mandate-system applied to them. Weizmann stated at the conference that "the Zionist objective was gradually to make Palestine as Jewish as England was English" Shortly thereafter, both men made their statements to the conference. After 1920, he assumed leadership in the World Zionist Organization, creating local branches in Berlin serving twice (1920–31, 1935–46) as president of the World Zionist Organization. Unrest amongst Arab antagonism to Jewish presence in Palestine increased erupting into riots. Weizmann remained loyal to Britain, tried to shift the blame onto dark forces. The French were commonly blamed for discontent, as