My hope is Donald Trump will focus on building bridges instead of walls.

In the end, the American dream is not a sprint, or even a marathon, but a relay. Our families don't always cross the finish line in the span of one generation. But each generation passes on to the next the fruits of their labor.

A couple of years ago, my wife, Erica, and I were getting our daughter ready for school and an image of President [Barack] Obama was on one of the morning shows. And I said, oh, look, Carina, there's the president. You can be president one day. And she said, right away, that's for boys. And so right away I said, oh, no, you can be a doctor. You can be a lawyer. You can be anything you want. You can be president.

My hope is Donald Trump will focus on building bridges instead of walls.

My grandmother didn't live to see us begin our lives in public service. But she probably would have thought it extraordinary that just two generations after she arrived in San Antonio, one grandson would be the mayor and the other would be on his way - the good people of San Antonio willing- to the United States Congress.

So my concern is that - what the campaign has to do is to pull those folks [negative to Donald Trump] out and make sure that they actually get to the ballot.

The American dream is not a sprint, or even a marathon, but a relay. Our families don't always cross the finish line in the span of one generation. But each generation passes on to the next the fruits of their labor. My grandmother never owned a house. She cleaned other people's houses so she could afford to rent her own. But she saw her daughter become the first in her family to graduate from college. And my mother fought hard for civil rights so that instead of a mop, I could hold this microphone.