Election strategist Prashant Kishor, the hate figure for rebels leaving Bengal Chief Minister Mamata Banerjee, threw a dare today at the BJP after its record acquisition of Trinamool defectors during Amit Shah's weekend visit to the state. Prashant Kishor, drafted by Mamata Banerjee for her campaign for the Bengal election four months away, said the BJP would "struggle to cross double digits" in the 294-member assembly and vowed to quit Twitter if it did better than he predicted.