The Clinton administration negotiated with Canada and Mexico a parallel agreement on the environment, the North American Agreement on Environmental Cooperation (NAAEC), which led to the creation of the Commission for Environmental Cooperation (CEC) in 1994. To address concerns that NAFTA, the first regional trade agreement between a developing and two developed countries, could have a negative impact on the environment, the Commission was mandated to conduct a continuous ex-post environmental assessment. It created one of the first ex-post frameworks for the environmental assessment of trade liberalization, which aims to provide a body of evidence against the initial assumptions about NAFTA and the environment. such as fears that NAFTA will trigger a «race to the bottom» in environmental regulation between the three countries, or that NAFTA will pressure governments to increase their environmental protection.  The CEC held four symposia [when?] to assess the environmental impact of NAFTA and commissioned 47 papers on the subject from leading independent experts.  The U.S. Chamber of Commerce attributed to NAFTA the increase in trade in goods and services with Canada and Mexico increased from $337 billion in 1993 to $1.2 trillion in 2011, while the AFL-CIO accused the agreement of sending 700,000 U.S. manufacturing jobs to Mexico during that period.  Maquiladoras (Mexican assembly plants that collect imported components and produce goods for export) have become a milestone in trade in Mexico. They moved from the United States to Mexico, hence the debate about losing American jobs.
Revenues in the maquiladora sector had increased by 15.5% since the introduction of NAFTA in 1994.  Other sectors have also benefited from the free trade agreement, and the share of exports to the United States from non-border states has increased over the past five years [When?], while the share of exports from border states has decreased. This allowed for rapid growth in non-cross-border metropolitan areas such as Toluca, León and Puebla, all of which were more populous than Tijuana, Ciudad Juárez and Reynosa. After the United States took office, President Donald Trump in January 2017, he attempted to replace NAFTA with a new agreement and began negotiations with Canada and Mexico. In September 2018, the United States, Mexico and Canada reached an agreement to replace NAFTA with the Agreement between the United States, Mexico and Canada (USMCA), and the three countries ratified it by March 2020. NAFTA remained in effect until the implementation of the USMCA.  In April 2020, Canada and Mexico informed the United States that they were ready to implement the agreement.  The USMCA entered into force on July 1, 2020, replacing NAFTA. NAFTA was the largest free trade agreement in the world when it was established on January 1, 1994. NAFTA was the first time two industrialized countries signed a trade agreement with an emerging market.
NAFTA allows your company to ship eligible goods duty-free to customers in Canada and Mexico. Goods can fall under NAFTA rules of origin in a variety of ways. This may be because the goods are wholly obtained or manufactured in a NAFTA party, or because the rule of origin of the good in a NAFTA party requires enough work and equipment to make the product what it is when exported. NAFTA was actually led by Bill Clinton`s predecessor, George H.W. Bush negotiated, who decided to continue talks to open trade with the United States. Bush initially tried to reach an agreement between the United States and Mexico, but President Carlos Salinas de Gortari pushed for a trilateral agreement between the three countries. After talks, Bush, Mulroney and Salinas signed the agreement in 1992, which went into effect two years later after Clinton was elected president. If the original Trans-Pacific Partnership (TPP) had entered into force, existing agreements such as NAFTA would be reduced to provisions that do not conflict with the TPP or require greater trade liberalization than the TPP.  However, only Canada and Mexico have the prospect of becoming members of the TPP after U.S.
President Donald Trump withdrew the United States from the agreement in January 2017. In May 2017, the remaining 11 TPP members, including Canada and Mexico, agreed to proceed with a revised version of the trade agreement without U.S. participation.  Following diplomatic negotiations in 1990, the leaders of the three countries signed the agreement on December 17, 1992 in their respective capitals.  The signed agreement then had to be ratified by the legislature or parliamentary branch of each country […].