Divorce is one of the key predictors of poverty for a child growing up in a home that's broken.

I support workplace clean air. But a federal ban on smoking would mean that you couldn't smoke in your own home. I don't care what people do in their home.

So when we're really addressing issues like poverty, you can't do that without addressing the real driver of some of those, which is stable homes, families. So that's why to me those issues are important. They're not frivolous. They're critical economic issues.

I've had the privilege of working with Bono for the past few years in the One Campaign to fight AIDS and hunger and disease around the world. Bono is an Irishman and a great humanitarian. And I remember him telling me of his admiration for America.