Why is the NDA so disunited on the presidential poll? Why are two staunch long-term allies — the Janata Dal (United) in Bihar and the Shiv Sena – going against the BJP when it makes little sense to create dissonance right now when the UPA is on the ropes? In both cases, it could be the Modi factor — and the possibility of an early poll — at work. JD(U) and Shiv Sena see threats to their future in Modi’s possible elevation after the Gujarat elections and they are making their moves right now.