Let me start off by saying that in 2000 I said, 'Vote for me. I'm an agent of change.' In 2004, I said, 'I'm not interested in change - I want to continue as president.' Every candidate has got to say 'change.' That's what the American people expect.
I've come to embrace the notion that I haven't done enough in my life. I've come to confirm that one's title, even a title like president of the United States, says very little about how well one's life has been led. No matter how much you've done or how successful you've been, there's always more to do, always more to learn, and always more to achieve.
The president and the executive branch are always going to have greater latitude and greater authority when it comes to protecting America because sometimes you just have to respond quickly and not everything that is a danger can be publicized and be subject to open debate, but there have to be some guardrails.
I just didn't want to get out there anymore; I didn't want to get back into what I call 'the swamp.' And the other reason why is I don't think it's good for the presidency for a former president to be opining about his successor. President Obama's got plenty of critics - and I'm just not gonna be one.