Mexican President Andres Manuel Lopez Obrador takes questions from journalists at his daily press conference at the National Palace, Mexico City, March 8, 2019 (AP photo by Marco Ugarte).

MERIDA, Mexico—When Andres Manuel Lopez Obrador was elected president of Mexico last July, his victory was seen as a break with the stagnant and corrupt two-party system that had dominated high-level Mexican politics for nearly 90 years. Most observers expected AMLO—as the veteran leftist is known in Mexico—and his Morena party to shake up Mexican politics through populist policies, such as a rejection of the free-market consensus that had taken hold in Mexico City in recent years. Domestically, AMLO has indeed been extremely active since taking office, tackling issues as diverse as gas theft and nursery school funding. On foreign […]

A U.S. Customs and Border Protection agent patrols on the U.S. side of a razor-wire-covered border wall that separates Nogales, Mexico from Nogales, Ariz., March 2, 2019 (AP photo by Charlie Riedel).

There has been much to criticize about President Donald Trump’s handling of America’s national security, including his recent declaration of a national emergency on the southern border. But while that declaration might be misguided, Trump has been right about one thing: The United States has never developed an effective strategy for the actual security challenges south of the border. Since the United States became a global power in the 20th century, it has used a sequenced method for addressing emerging threats—first building an understanding of them, then developing a working consensus among security experts and political leaders, and then relying […]