The Congress in Karnataka on Thursday demanded the resignation of Chief Minister Basavaraj Bommai, alleging he is directly responsible for a corrupt electoral practice by assigning a private entity to collect door-to-door voter information.

Congress general secretary and the party`s Karnataka in-charge Randeep Singh Surjewala said at a press conference that Bruhat Bengaluru Mahanagara Palike, the civic agency, authorised a private firm in August to carry out a door-to-door survey of voters `free of cost` who gathered information about their gender, mother tongue, collected voter ID and Aadhaar details.