It's all drama. The fourth year is complete and govt is running in 5th year, the last year. Both the parties have to go to people during election and both of them cannot go hand in hand as they are competitors in west bengal and kerala.
Nuclear Deal is shield behind which communists and congress have found the reason to dismantle UPA and fight elections. Post election both these parties will come again to reform UPA.
Sheer drame to keep BJP a better party out of power.