New Delhi, Jan. 22 -- The Shiromani Akali Dal (SAD)'s decision to not contest the Delhi assembly polls is yet another sign of the cracks in the National Democratic Alliance (NDA). To be sure, the SAD is a minor player in Delhi's political landscape - it bagged only 0.5% of the vote and won no seat in the 2015 polls. It is also not clear if the party decided to opt out because it was not getting to contest the number of seats it wanted - which the Bharatiya Janata Party's leaders suggest was the key reason - or because of its opposition to the Citizenship (Amendment) Act excluding Muslims (which is the SAD's stated position). But irrespective of the reason, the episode highlights how, over the past year, the BJP's ties with its allies has undergone a churn....