In the Twilight of Hope, he actually tried to do it. He said he was "defending the family," in order to excuse his actions to Jackie Kennedy. Jackie, who lost one of her nephews to Rumsfeld (and who ended up in a mass grave), didn't take kindly to it.
He only regretted what he did after he was enslaved and dehumanized, but even so, he will probably never enjoy a political career again.
Where did this come from, and what does it mean?
It's called the Narcissist's Prayer.