Yogi Adityanath, a controversial BJP lawmaker, will be one of the party's key campaigners for by-elections in Uttar Pradesh, in what is being seen as a major shift in political strategy. Along with union minister Kalraj Mishra and the party's state unit chief Laxmikant Bajpayee, Yogi Adityanath will lead the campaign for the September 13 by-elections.