Incumbent Chief Nitish Kumar is seeking a fourth term in Bihar. However, his decision to announce his retirement in the run up to phase-3 polling, sent shock waves indicating all was not right with the JD(U) chief, a key ally of the BJP in Bihar, who seems to have been side-tracked. NDTV's Manish Kumar reports on Nitish Kumar's changing equation within the NDA and new challenger Chirag Paswan.