"The bilateral economic relationship with Mexico is among the most important for the United States. The most significant feature of the relationship is the North American Free Trade Agreement (NAFTA), which has been in effect since 1994. In bilateral trade, Mexico is the United States' second most important trading partner, while the United States is Mexico's most important trading partner. In U.S. imports, Mexico ranks third among U.S. trading partners, after Canada and China, while in exports Mexico ranks second, after Canada. The United States is the largest source of foreign direct investment (FDI) in Mexico. These links are critical to many U.S. industries and border communities."
CRS Report for Congress, RL32934