In the wake of the Iowa Caucuses, I am again struck by the tremendous diversity of this country, and how it's reflected in our candidates for president.

We have an African American man, a woman, and an Hispanic man, and that's just on the Democratic side.

The Republican side is even more striking: a Mormon, a war veteran, a preacher, and perhaps most astonishing of all, an opera lover.

Now, that's what I call diversity.