New Delhi/Amaravati, March 16: In a major setback to the BJP, the TDP on Friday quit the NDA and tabled a no-confidence motion against the Modi government over its refusal to grant special category status to Andhra Pradesh, a move that may herald a new political alignment before the next year Lok Sabha polls. The TDP with 16 MPs in the Lok Sabha — the second biggest ally of the BJP after the Shiv Se (18) — announced the decision to exit from the NDA after Andhra Pradesh Chief Minister N. Chandrababu idu held a politburo meeting through teleconferencing with his MPs in Delhi.