The Shiv Sena's plans to take power in Maharashtra after ending its alliance with long-term partner BJP have hit a wall with the Congress holding the key. Sharad Pawar's Nationalist Congress Party (NCP), invited yesterday by the Governor to form a government after the BJP and Shiv Sena failed to do so, also waited as Congress chief Sonia Gandhi held consultations long after telling Sena chief Uddhav Thackeray in a phone call that she would get back to him. With no party appearing to be in a position to form a government weeks after the October 24 state election verdict, Maharashtra is staring at President's Rule.