I do think that I am generally optimistic.

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.

Now is not the time to gut these job-creating investments in science and innovation. Now is the time to reach a level of research and development not seen since the height of the Space Race.

Under my plan of a cap and trade system, electricity rates would necessarily skyrocket… Because I’m capping greenhouse gasses, coal power plants, natural gas…you name it…whatever the plants were, whatever the industry was, they would have to retro-fit their operations. That will cost money…they will pass that money on to the consumers.

I was pretty realistic to people about what we could get done, and the situation we were in, and trying to tamp down expectations. If you listen to my stump speeches, if you listen to what I said at Grant Park, I kept on saying, "Look, this is not just about me, this is not going to happen in one year, or one term, or even one presidency." And we tried to layer into everything we were saying a sense of hope, but also realism.

The notion that we can control the flow of information is obsolete.

There's nothing that America can't handle if we actually look squarely at the problem. ...Change depends on our actions.