Most people who live at the border or are familiar with the border know that a Berlin-like wall stretching from San Diego to Brownsville is not necessary. And the costs would be prohibitive. And there are places on the border, such as the Arizona desert or the open terrain around the Big Bend in South Texas, where Mother Nature has created her own barrier that is not easily passable. Or if you do pass through it, you are easily detected.

To the extent that President Trump means strengthened border security, I am fully in favor of the idea that the rule of the law, secure borders and public safety should prevail. Drugs should not enter illegally. Migration should take place in accordance with lawful norms and secure and safe procedures.

Until we have a legitimate labor market between Mexico and the United States, people will attempt to come here to work.

The work the Mexicans are doing in terms of migration control on Mexico's southern border is crucial to our own border security.

Most people who live at the border or are familiar with the border know that a Berlin-like wall stretching from San Diego to Brownsville is not necessary. And the costs would be prohibitive. And there are places on the border, such as the Arizona desert or the open terrain around the Big Bend in South Texas, where Mother Nature has created her own barrier that is not easily passable. Or if you do pass through it, you are easily detected.

Mexico has become a robust democracy with a robust press and an active legislature. It has gone from being a sending country for migrants to a transit country, and increasingly a receiving country for migrants in its own right.

If you build a 50-foot wall, you'll soon be confronted with a 51-foot ladder.