i'd have to say the Azz/lee run of Superman and that whole convoluted Doomsday/gog story where Doomsday turns heroic and time again gets altered in the DCU.
From Washington Times interview with DeLay:
Mr. Hurt: Have you ever crossed the line of ethical behavior in terms of dealing with lobbyists, your use of government authority or with fundraising?
Mr. DeLay: Ever is a very strong word.