If you can look back and say, "The economy's better. Our security's better. The environment's better. Our kids' education is better," if you can say that you've made things better, then considering all the challenges out there, you should feel good. But I'm the first to acknowledge that I did not crack the code in terms of reducing this partisan fever.

I became a lightning rod for some partisan battles. I could not be prouder of the track record we've put together. By almost every measure, the country is significantly better off than when I came in.

I don't want ever to be a president who is comfortable and at ease with killing people.

Environmentalism is not an upper-income issue, it's not a white issue, it's not a black issue, it's not a South or a North or an East or a West issue. It's an issue that all of us have a stake in. And if I can do anything to make sure that not just my daughter but every child in America has green pastures to run in and clean air to breathe and clean water to swim in, then that is something I'm going to work my hardest to make happen.

I mean, if you think about - if you think about it, UPS and FedEx are doing just fine, right? No, they are. It's the Post Office that's always having problems.

Sometimes we take somebody who's been in the trenches and fought the good fight and been steady for granted. Sometimes we act as if never having done something and not knowing what you're doing is a virtue.

And lest we get on our high horse and think this is unique to some other place, remember that during the Crusades and the Inquisition, people committed terrible deeds in the name of Christ. In our home country, slavery and Jim Crow all too often was justified in the name of Christ.