The League gradually became the leading representative body of Indian Muslims. Jinnah became its president in 1916, and negotiated the Lucknow Pact with the Congress leader, Bal Gangadhar Tilak, by which Congress conceded the principle of separate electorates and weighted representation for the Muslim community. However, Jinnah broke with the Congress in 1920 when the Congress leader, Mohandas Gandhi, launched a law violating Non-Cooperation Movement against the British, which a temperamentally law-abiding barrister Jinnah disapproved of. Jinnah also became convinced that the Congress would renounce its support for separate electorates for Muslims, which indeed it did in 1928. In 1927, the British proposed a constitution for India as recommended by the Simon Commission, but they failed to reconcile all parties. The British then turned the matter over to the League and the Congress, and in 1928 an All-Parties Congress was convened in Delhi. The attempt failed, but two more conferences were held, and at the Bombay conference in May, it was agreed that a small committee should work on the constitution. The prominent Congress leader Motilal Nehru headed the committee, which included two Muslims, Syed Ali Imam and Shoaib Quereshi; Motilal's son, Pt Jawaharlal Nehru, was its secretary. The League, however, rejected the committee's report, the so-called Nehru Report, arguing that its proposals gave too little representation (one quarter) to Muslims – the League had demanded at least one-third representation in the legislature. Jinnah announced a "parting of the ways" after reading the report, and relations between the Congress and the League began to sour.