The U.S. Department of State has started reviewing Mexico's 53 consulates in the United States, CBS News reported on May 7.

Mexico has the largest foreign consular network in the United States, which is mostly concentrated in border states with large Mexican or Mexican-American populations, such as California, Texas and Arizona. Its offices provide documentation and legal aid, among other services. The announcement came amid a broader U.S. crackdown on illegal migration, which has led to a spike in detentions, deportations and even the deaths of Mexican citizens in U.S. custody. It also followed growing tensions between the two countries around the fight against drug trafficking cartels, tense trade negotiations and other sector-specific issues that have led Mexico to make concessions to appease Washington, such as around aviation rules, screwworm control and water sharing.