The border wall built during the Trump administration now stands along roughly 190 miles of Arizona's border with Mexico.

Robert Wall is Executive Editor for Defense and Space. Based in London, he directs a team of military and space journalists across the U.S., Europe and Asia-Pacific.

Gavin Bade is a reporter for The Wall Street Journal in Washington focused on trade, economics and industrial policy.

We speak for free markets and free people, the principles, if you will, marked in the watershed year of 1776 by Thomas Jefferson's Declaration of Independence and Adam Smith's “Wealth of Nations ...