We can't afford more top-down economics. What we need are policies that will grow and strengthen the middle class.

For too many of us, it's become safer to retreat into our own bubbles, whether in our neighborhoods or on college campuses, or places of worship or especially our social media feeds, surrounded by people who look like us and share the same political outlook and never challenge our assumptions. And increasingly, we become so secure in our bubbles that we start accepting only information, whether it's true or not, that fits our opinions, instead of basing our opinions on the evidence that is out there.

For decades, our differences with Iran meant that our governments almost never spoke to each other. Ultimately, that did not advance America's interests.

My second piece of advice is to stay global. As the world continues to change and we become more connected to each other, globalization will bring both benefits and disruptions to our lives. But either way, it's here, and it's not going away.

When you've got little kids, and you're tucking them in. When you open a door and they're in their pajamas and they're, you know, wrestling with you and asking you, you know, to read to them and stuff, [The white House] starts feeling like home pretty quick. Not to mention having a mother-in-law upstairs, and the dog, and now two.

I accept that people are going to call me awful things every day, and I will always defend their right to do so.

What drags down our entire economy is when there's an ever-widening chasm between the ultra-rich and everybody else.