In politics Maulana Usmani had from the very beginning joined the Jami'at Ulema-e Hind and earlier he had been an important member of the Khilafat Committee. In 1333/1914, during the Balkan war, he had participated very ardently in collecting funds for the Turks. Maulana Usmani remained a member of the executive council of the Jami'at ­Ulema Hind for a number of years, and was reckoned amongst the first class leaders of the said organization of the Ulema. In the end, due to the question of one nation theory, he dissented with the Jami'at Ulema and joined the Muslim League and, in 1365/1946, he was elected president of the Jami'at Ulema-e Islam. In 1946, when an election was held for the Indian Constituent Assembly, he was elected its member on behalf of the Muslim League from Bengal. After the partition of India, he was elected as a member of the Pakistan Constitutent Assembly in his capacity as a representative of East Bengal. To participate in the session of the Pakistan Constitutent Assembly Maulana Usmani went to Pakistan before Ramadhan, A. H. 1366/1947 and then stayed in Karachi fore over. Along with his membership of the Pakistan Constitutent Assembly he was also elected as the president of the Shara'i Dastur-saz Committee. In Pakistan he rendered many religious and national services; his academic and political services had a special impression on the highest authority of Pakistan. He enjoyed a great position particularly as a religious divine and thinker and along with his religious leadership, his political leadership was also acknowledged on all hands.

The above text is taken from http://www.darululoom-deoband.com/en...oulema/vc2.htm.