Bihar CM Nitish Kumar and deputy Tejashwi Yadav Monday took their renewed mission for a united anti-BJP opposition to Kolkata and Lucknow, first meeting Bengal CM Mamata Banerjee to push for a conclave of non-NDA parties in Bihar and then SP chief Akhilesh Yadav to clarify that what mattered was the cause and not the mantle of leadership.Bihar CM Nitish Kumar and deputy Tejashwi Yadav Monday took their renewed mission for a united anti-BJP opposition to Kolkata and Lucknow, first meeting Bengal CM Mamata Banerjee to push for a conclave of non-NDA parties in Bihar and then SP chief Akhilesh Yadav to clarify that what mattered was the cause and not the mantle of leadership.