by Debra J. Saunders

About the author: Debra J. Saunders is a columnist for the San Francisco Chronicle.

The American-Mexican border fence in Tecate, a truck stop of a town some 33 miles east of San Diego, California, doesn’t look like a fence in many spots. In some places, the metal sections are gone. Lonely rods, with nothing but air between them, mark where a fence used to be. Not that these gaps make much of a difference. At the outskirts of the much larger, adjacent town of Tecate, Mexico, the fence ends.

A Porous Border

Idrove past homes guarded by barbed-wire and barking dogs to the end of the fence with a small group of observers on Wednesday afternoon. There, we saw a man with a walkie-talkie—probably a “coyote,&rdquo...