New Delhi, May 4 -- The results and trends of assembly polls on Monday signalled some tectonic political changes with the BJP on course to form its first government in West Bengal and actor-turned politician Vijay writing a new script in Tamil Nadu.

BJP-led NDA is on course to a sweeping victory in Assam as is Congress-led United Democratic Front (UDF) in Keralam, and NR Congress-led alliance in Puducherry.

BJP's expected victory in West Bengal will mark a significant moment for the party as it had been for long a marginal player in the state dominated for years by the Congress, Left parties and later Trinamool Congress. It is also the home state of the BJP's ideologue Syama Prasad Mookerji.

The BJP had won 77 seats in the last assembl...