The AIADMK appeared headed toward its most serious internal rupture since the death of J Jayalalithaa, as deep divisions emerged within the party over whether to support Vijay’s Tamilaga Vettri Kazhagam (TVK) in forming a coalition government – a move that sources across parties said is also being shaped by the BJP’s determination to prevent the Congress from entering government in Tamil Nadu. Senior AIADMK sources confirmed that the BJP high command in New Delhi is uncomfortable with the prospect of a Congress-backed TVK government taking shape in Chennai , especially after the Congress’s resurgence in neighbouring Kerala. Now, with TVK at 108 seats falling short of the 118-seat majority mark and coalition arithmetic becoming unavoidable, the BJP is seen backing efforts to push the AIADMK toward supporting Vijay instead of allowing Congress and Left parties to become the pillars of a new government.…