The Congress and Samajwadi Party in Madhya Pradesh on Friday demanded a caste-based census ahead of the assembly elections later this yearTalking to reporters, state Congress Committee state president Kamal Nath said: “Caste census is very necessary for balance, why should it not be done? After all, what are these people (BJP-led state and central government) afraid of and what are they trying to hide? The caste census should be done immediately