Ms Mamta Didi was trying to forge unity amongst all opposition parties to challenge the ruling party for the last many months' the source says. The first meeting of all opposition leaders to select the common candidate for the president position was also called by her source says. Leaders of seventeen parties assembled to discuss the name. The second meeting was called by Mr Sharad Pawar in her absence as appeared on news she in the first meeting itself told about her non-availability in the second meeting source says. But strangely in the letter issued by Sharad Pawar, there is no mention of the earlier first meeting. Probably this has irked Didi, the source says. Ms Mamta Banerjee was trying with moves to become an undisputed leader of opposition unity and enter into the national politics but her actions were ignored and the paperwork undertaken to take the nomination and scheduling decisions for the proposed candidate was drawn by none other than Sudhindr Kulkarni, ex-assistant of Advani. The committee formed to overlook the election arrangements and other supports is not having a name from the TMC source says. By all these acts it seems that Ms Mamta Banerjee is limited to her state and her ambitions to become national leader suffered badly for the time being and Mrs Sonia Gandhi emerged as the true leader of the opposition alliance source says?