In 1940 he and Amin al-Husayni moved to Baghdad where he held two weeks of meetings with Colonel Stewart Newcombe. Following these meeting both Jamal and Musa al-Alami agreed to the terms of the White Paper and both signed a copy of it in the presence of the Prime Minister of Iraq Nuri as-Said. The following year, following the collapse of the Rashidi revolt, he was amongst a group of eighty who fled to Tehran. On his continued attempt to escape the British he was taken prisoner at Ahwaz and interned in Southern Rhodesia where he was held until November 1945 when he was allowed to move to Cairo. In Egypt he built ties with the Muslim Brotherhood. The leader of the mainstream Wafd party, Mustafa el-Nahhas, regarded him as an extremist. In 1945 the Arab Higher Council was reformed, once again dominated by traditional leaders from the 1930s.