Throughout my 20s and early 30s, I had jobs that I loved. I worked in city government. I ran a youth organization. I served as an associate dean at a university. And I couldn't imagine how a baby would fit into all of that.

My family didn't have a lot of money, so I worked my heart out to get my degrees. But the minute I graduated, suddenly everyone was asking me, 'Well, when are you going to get married and start having kids?' And the truth is I had no idea how I would balance the expected role of wife and mother with a challenging career.

My mother's love has always been a sustaining force for our family, and one of my greatest joys is seeing her integrity, her compassion, her intelligence reflected in my daughters.

The issues a president faces are not black and white, and cannot be boiled down into 140 characters. Because when you have the nuclear codes at your fingertips and the military at your command, you can't make snap decisions. You can't have a thin skin or the tendency to lash out.

My work on human capital began with an effort to calculate both private and social rates of return to men, women, blacks, and other groups from investments in different levels of education.

We are working essentially to build a leadership force of folks who will, during their first two years of teaching, actually put their kids on a different trajectory - not just survive as a new teacher, but actually help close the achievement gap for their kids.

I had the best teacher there can be in man management or managing a football club.

One thing I found very interesting about comedians around the world was their knowledge of stuff outside of their own culture and comfort zone. That's not very common in the States. We produce our own soft power, which is pop culture, but we rarely try to absorb and learn information from other cultures and countries.