I was raised by a single mom who had to put herself through school while looking after two kids. And she worked hard every day and made a lot of sacrifices to make sure we got everything we needed. My grandmother, she started off as a secretary in a bank. She never got a college education, even though she was smart as a whip. And she worked her way up to become a vice president of a local bank, but she hit the glass ceiling. She trained people who would end up becoming her bosses during the course of her career.

Sometimes they're nothing, sometimes they're something, sometimes there's a connection that years later may show up. All of this information is useful.

There is no shame in confusion or fear. "There was only shame in the silence fear had produced. . . . It was the silence that betrayed us."

If you look at sort of how politics has divided itself here in this country, the big divide right now is between urban areas, which have become increasingly Democratic, and rural or exurban areas that feel as if they're being ignored.

It was basic research in the photoelectric field-in the photoelectric effect that would one day lead to solar panels. It was basic research in physics that would eventually produce the CAT scan. The calculations of today's GPS satellites are based on the equations that Einstein put to paper more than a century ago.

What we shouldn't be doing is trying to take away your rights to bargain for better wages or working conditions... These so-called "right to work" laws, they don't have to do with economics; they have everything to do with politics. What they're really talking about is giving you the right to work for less money.

I think back to the day I drove Michelle and a newborn Malia home from the hospital nearly 11 years ago - crawling along, miles under the speed limit, feeling the weight of my daughter's future resting in my hands. I think about the pledge I made to her that day: that I would give her what I never had - that if I could be anything in life, I would be a good father. I knew that day that my own life wouldn't count for much unless she had every opportunity in hers.