The leading presidential contender of the ruling Saenuri Party on Saturday vowed to root out corruption, an apparent attempt to distance herself from President Lee Myung-bak amid a public outcry over a string of high-profile corruption scandals. \"Above all, I will create a clean government,\" Park Geun-hye said in a speech in the southeastern city of Busan. \"I will become a president who will break the cycle of corruption.\"    It is the first time Park has mentioned corruption in her public appearances on a nationwide campaign trail to try to win the party\'s nomination for the December presidential election.