Congress leader DK Shivakumar on Monday visited Nandini milk parlour in Karnataka's Hassan and "bought milk products" amid controversy over Amul's decision to enter the state's dairy market. "BJP government is trying to hijack the Nandini brand, which is a symbol of self-esteem of...Kannadigas...[they'll] never sell their self-respect," he tweeted. Assembly polls in state will be held on May 10.