Author and BJP national spokesperson M.J. Akbar believes there is only one reasonable explanation for this long surveillance.He says ,The government was not sure whether Bose was dead, and thought that if he were alive he would be in some form of communication with his family in Calcutta. The nation, after all, would have welcomed Bose's return. Bose was the only charismatic leader who could have mobilised Opposition unity against Congress, and offered it a serious challenge in the 1957 elections.