With the cancellation of Amit Shah's rally and the arrest of the BJP candidate contesting against Mamata Banerjee's nephew, the war between Ms Banerjee and the BJP in West Bengal has escalated. After being denied permission for the rally, Mr Shah challenged Ms Banerjee to arrest him. BJP also claimed harsh steps taken against a young BJP leader who shared a meme on Ms Banerjee. Is it TMC's nervousness regarding BJP's growing presence or BJP's frustration at not having enough ground in West Bengal?