If you want to right-size executive power relative to the other branches of government, the best way to do that is to have a healthy Congress in which the two parties are debating, disagreeing, but also occasionally working together to pass legislation.

As we look forward to the New Year, let's resolve to recommit ourselves to the values we share.

If we got there and we looked up and we said, "You know what? Black folks are still doing a little bit worse off than whites, but it's not like it was 20 years ago," then we can have a discussion about how do we get that last little bit. But that's a high-class problem to have.

So don't get cynical. Cynicism didn't put a man on the moon. Cynicism has never won a war, or cured a disease, or built a business, or fed a young mind. Cynicism is a choice. And hope will always be a better choice.

I don't regret the fervor, because I do believe, in the African American community but also for other communities, and I know from talking to people, for communities around the world, the election of an African American to the most powerful office on Earth meant things had changed, and not just in superficial ways. That in some irreversible way the world was different.

You look at something like health care, the Affordable Care Act. And for all the controversy, we now have 20 million people who have health insurance who didn't have it. It's actually proven to be more effective, cheaper than even advocates like me expected.

I'm not going to Wall Street [after the presidency]. The amount of time that I'll be investing in issues is going to be high. But it'll be necessarily in a different capacity.