Mamata did injustice to Bengal, pushed state backward in every field, says Amit Shah

"Mamata Banerjee has taken West Bengal backward in every sphere. People of the State will never forgive her. Leaders of the Trinamool Congress and other parties are joining Bharatiya Janata Party. Mamata di will find herself alone by the time election happens. She has done injustice to people of State," Union Minister said.