Karl Rove has not credibly explained his activities.

Two years ago today, Karl Rove tried to impeach the credibility of Joseph Wilson in a conversation with Time reporter Matt Cooper. In doing so, he publicly identified Wilson's wife, Valerie Plame, as a CIA operative. Wilson had published an oped in the NYT that clearly refuted the claim that Iraq had tried to buy uranium from an African source.
George Bush made that claim in his State of the Union address on January 28, 2003:

The British government has learned that Saddam Hussein recently sought significant quantities of uranium from Africa.
Our intelligence sources tell us that he has attempted to purchase high-strength aluminum tubes suitable for nuclear weapons production.
Saddam Hussein has not credibly explained these activities.

Commentators are focusing on the minutia of whether Karl Rove broke the law when he outed Ms. Plame, but the greater issue of his conduct remains. Simply put, Karl Rove has not credibly explained his activities.