The North American Free Trade Agreement (NAFTA) entered into force on January 1, 1994. The agreement was signed by President George H. W. Bush on December 17, 1992, and approved by Congress on November 20, 1993. The NAFTA Implementation Act was signed into law by President William J. Clinton on December 8, 1993 (P. L. 103-182). The overall economic impact of NAFTA is difficult to measure since trade and investment trends are influenced by numerous other economic variables, such as economic growth, inflation, and currency fluctuations. The agreement may have accelerated the trade liberalization that was already taking place, but many of these changes may have taken place with or without an agreement. Nevertheless, NAFTA is significant because it was the most comprehensive free trade agreement (FTA) negotiated at the time and contained several groundbreaking provisions. A legacy of the agreement is that it has served as a template or model for the new generation of FTAs that the United States later negotiated and it also served as a template for certain provisions in multilateral trade negotiations as part of the Uruguay Round. The 113th Congress faces numerous issues related to international trade. Canada and Mexico are the first and third largest U. S. trading partners, respectively. With the two countries participating in the negotiations to conclude a Trans-Pacific Partnership (TPP) free trade agreement among the United States and 10 other countries, policy issues related to NAFTA continue to be of interest for Congress. If negotiations progress, a TPP agreement could affect the rules and market access commitments governing North American trade and investment since NAFTA entered into force. A related trade policy issue in which the effects of NAFTA may be explored is the possible renewal of Trade Promotion Authority (TPA; formerly known as "fast-track authority") to provide expedited procedures for the consideration of bills to implement trade agreements. | CRS Report for Congress by M Angeles Villarreal, Paperback | Indigo Chapters