DEHRADUN, March 13 -- The Pradesh Congress Committee (PCC) president Karan Mahara has demanded that the government should conduct the caste census and economic mapping in the country. Interacting with the media persons at Congress Bhawan on Tuesday, Mahara said that the recent statement by a Member of Parliament that the party is aiming to win seats in the Lok Sabha to bring changes in the constitution exposes the strategy of the BJP. He said that BJP is planning to change the constitution drafted by BR Ambedkar and its objective is to suppress freedom of expression, destroy democratic institutions and democracy in the country. He said that the Congress president Mallikarjun Kharge and former president Rahul Gandhi believe that the caste ce...