The document discusses the important role of U.S. ambassadors to Mexico. It notes that the U.S.-Mexico relationship is both intense and complex, with more treaties, agreements, and issues between the two countries than any other two. The U.S. ambassador to Mexico oversees the large U.S. embassy and consulates in Mexico and coordinates relations between numerous U.S. agencies and the Mexican government. The document provides background on U.S.-Mexico diplomatic relations and the challenges U.S. ambassadors have faced due to historical tensions between the two countries. It describes the selection process for U.S. ambassadors to Mexico and notes they must be both diplomatically skilled and politically savvy