Lee Myung-bak second offered his resignation on Thursday . President Lee Myung-bak did not accept Chung Un-chan 's resignation at that time . President 's Chung has taken a beating in the polls .
Chung Un-chan first offered his resignation on July 5 . President Lee Myung-bak did not accept Chan 's resignation at that time . President 's Grand National Party has taken a beating in the polls .