The citizenship bill is set to trigger a political realignment in the northeast, where the BJP ruling all seven states singly or as part of a coalition. Ten parties - all key regional allies of the BJP -- have decided to oppose the bill, which has already been passed by the Lok Sabha and could be tabled soon in the Rajya Sabha. The parties have indicated that if the Centre is not ready to bend, they would walk out of the 13-party Northeast Democratic Alliance -an anti-Congress platform through which the BJP made inroads in the northeast.