At the out set sonia can not talk on her own! These speaches were written by Mani Shankar Iyer!
It is big drama enacted before 100 crores indians. The is a convenient understanding between the left and Congress. Like Moghul Kings the crown is already set on Rahul Gandhi and she expects her family dynasty rule further another 300 yrs! CPM any how can not secure 300 seats or even a simple majority. As such for them congress is always a better choice than NDA ro BJP. So what is left