Intensifying its tirade against Akhilesh Yadav Government over Yadav Singh issue, State BJP president laxmikant Bajpai has demanded resignation of Chief Minister after the SC rejected the plea of the Government to stop CBI probe against corrupt engineer.“The Samajwadi party Government has lost its credibility as it is trying to protect a corrupt engineer. Hence CM should resign and seek fresh mandate,” he said in a statement issued here on Friday.