I have investigated myself

and cleared myself of any wrong doing.

You have to give Peter Mansbridge credit. He tried, three times, to get an answer from Ralph Goodale as to why he is not resigning as Finance Minister. To no ones surprise Mr. Goodale would not answer the question directly. (here is the video of the interview in RealPlayer format, h/t SinisterThoughts)

...know I've examined my own conduct in this matter and I'm confident that conduct is consistent with 30 years of integrity and trust in public life

Shouldn't you know this kind of thing without having to examine it? Either you were involved in a leak or you were not. All that an examination does is show that you are worried that there might some evidence, somewhere, that might implicate you. I am not saying that Ralph Goodale is guilty of anything...well other than bad communication. Because innocent people do not examine their own conduct.

Update: The Conservative Party was kind enough to provide the Ministerial precedent information that Peter Mansbridge was referring to.

Greg Sorbara resigned as Ontario Finance Minister in 2005, after it was revealed that he was named in a warrant as part of an ongoing RCMP investigation. (CP, October 12, 2005)
Judy Sgro resigned as Minister of Citizenship and Immigration in order to clear her name, following additional allegations in January 2004. (Ottawa Citizen, January 15, 2004)
John van Dongen stepped aside as B.C.Â’s Fisheries Minister in January 2003 pending an investigation. The special prosecutor concluded no charges should be laid because there was no evidence of "criminal intent." Van Dongen was reappointed to the cabinet. (Vancouver Sun, January 20, 2004)
Rob Samson stepped aside as OntarioÂ’s Minister of Correction Services during an OPP investigation. When he was cleared of any wrongdoing in the release of information about young offenders at Cobourg's Brookside Youth Centre, Samson was returned to cabinet. (Press Release, Office of the Premier of Ontario, March 8, 2001)
Moe Sihota stepped aside as B.C.'s Education Minister to await the result of two probes into his conduct. (Ottawa Citizen, December 14, 1996)

Update: David Akin takes this post one step further by providing links.