In their joint fight against drug traffickers, the United States and Mexico have forged an unusually close relationship in recent years, with the Americans regularly conducting polygraph tests on elite Mexican security officials to root out anyone who had been corrupted. But shortly after Mexico’s new president, Enrique Peña Nieto, took office in December, American agents got a clear message that the dynamics, with Washington holding the clear upper hand, were about to change.
There have long been political sensitivities in Mexico over allowing too much American involvement. But the recent policy changes have rattled American officials used to far fewer restrictions than they have faced in years. Asked about security cooperation with Mexico at a news conference on Tuesday, President Obama said: “We’ve made great strides in the coordination and cooperation between our two governments over the last several years. But my suspicion is, is that things can be improved.”