The Congress in Karnataka on Saturday staged a protest against the sanction granted by Governor Thaawarchand Gehlot to investigate and prosecute Chief Minister Siddaramaiah in the alleged Mysuru Urban Development Authority (MUDA) site allotment scam. Ruling party leaders led by Mr Siddaramaiah and his deputy DK Shivakumar held the agitation before taking out the 'Raj Bhavan Chalo' march.