New Delhi, Feb. 24 -- The central leadership of the Bharatiya Janata Party (BJP), which awaits its new national president, has had to step in to quell disagreements and differences in a clutch of states such as Karnataka and Telangana over the choice of who will lead party's state unit. In Madhya Pradesh and Uttar Pradesh, the process of selecting new state unit chiefs has also been mired in controversies amid lack of consensus on the probable candidates, people aware of the details said....