In the heat of electioneering, Karnataka Chief Minister H.D. Kumaraswamy has decried Kannada superstar Yash campaigning for multilingual South Indian actor Sumalatha Ambareesh, an Independent contesting in the high-profile Mandya Lok Sabha constituency against his son Nikhil Gowda of the ruling Janata Dal-Secular (JD-S), a party official said on Wednesday.