At his grand anti-BJP rally in Patna, Lalu Yadav today vented ire on former ally Nitish Kumar, saying he had agreed to let Mr Kumar be the Chief Minister only after "pressure" from ally Sharad Yadav and Samajwadi Party patriarch Mulayam Singh. On the dais with him was Sharad Yadav, and Akhilesh Yadav, the son of Mulayam Singh and former Chief Minister of Uttar Pradesh.