During the early 1990s, Mexico's domestic political sensitivities meant that it rarely extradited people who had committed crimes in the U.S. After NAFTA, extradition numbers began to increase until they surpassed 100 a year in the late 2000s.

Controlling President Trump seems incredibly difficult.

Front-line officials, including DEA agents, border patrol and other homeland-security professionals, should remind Mr. Trump how important Mexico's assistance is in achieving his national-security goals.

James G. Stavridis Quotes