When Bush's cabal commits the leaks, they obstruct justice and commit perjury.
When someone else leaks classified information about the Bush cabal's crimes, then the Department of Justice swings into action - to investigate the leak. The underlying crime is ignored.
By the way, warrantless and court-prohibited spying does qualify as "high crimes and misdemeanors," and as the Repubicans reminded us over and over again during President Clinton's terms, the President is NOT above the law. Unless it is a Republican President.