John M. Ackerman is a professor at the Institute for Legal Research of the National Autonomous University of Mexico, editor in chief of the Mexican Law Review, and a columnist for Proceso magazine and La Jornada newspaper. His website is johnackerman.blogspot.com.

As if America isn’t mired in enough wars, the president apparently thinks the rule of law stops at the Rio Grande. John M. Ackerman on America’s bizarre—and dangerous—decision to violate the Mexican constitution.

As Mexico's president visits Washington, tensions are flaring south of the border over drug violence and the economy—and much of the rage is directed at the U.S. John M. Ackerman on how Obama can defuse the crisis.