PM's nuclear deal moment: Part 2?

Mamata Banerjee and the UPA seemed to have crossed wires: both said the collapse in relationship happened because they couldn't get through on their cellphones. The key players, SP and BSP meanwhile are playing wait and watch. As the UPA government digs in its heels on reform and FDI, refusing to go back on it despite Mamata Banerjee's withdrawal threat, is this Dr Manmohan Singh's second nuclear deal moment? More importantly, will he walk out of it, the same way he did in 2008 - with his pride and his government intact?