The Shiv Sena today declared its backing for West Bengal Chief Minister Mamata Banerjee in the upcoming state Assembly election. Calling her the "real Bengal tigress", the Maharashtra-based party's senior leader and Rajya Sabha member, Sanjay Raut, today said it will not be contesting what appears to be a "Didi Vs All" fight this time. The West Bengal elections will be held in eight phases from March 27 to April 29 and the results will be declared on May 2.