With the end of the war, the British agreed to transfer power to Indian hands. All political prisoners were released in 1946 and Azad led the Congress in the elections for the new Constituent Assembly of India, which would draft India's constitution. He headed the delegation to negotiate with the British Cabinet Mission, in his sixth year as Congress president. While attacking Jinnah's demand for Pakistan and the mission's proposal of 16 June 1946 that envisaged the partition of India, Azad became a strong proponent of the mission's earlier proposal of 16 May. The proposal advocated a federal system with a limited central government and autonomy for the provinces. The central government would have Defence, Foreign Affairs and Communication while the provinces would win all other subjects unless they voluntarily relinquished selected subjects to the Central Government. Additionally, the proposal called for the "grouping" of provinces on religious lines, which would informally band together the Muslim-majority provinces in the West as Group B, Muslim-majority provinces of Bengal and Assam as Group C and the rest of India as Group A. While Gandhi and others expressed scepticism of this clause, Azad argued that Jinnah's demand for Pakistan would be buried and the concerns of the Muslim community would be assuaged. Under Azad and Patel's backing, the Working Committee approved the resolution against Gandhi's advice. Azad also managed to win Jinnah's agreement to the proposal citing the greater good of all Indian Muslims.