Democrats lamented that the agreement that Trump`s team had originally negotiated with Canada and Mexico shared a mistake with the treaty it needed to improve: it would be difficult to implement. In talking to Trump`s top representative, Robert Lighthizer, Democrats were able to find language that would have allowed countries or businesses to avoid sanctions by simply refusing to participate in dispute resolution bodies. The North American Free Trade Agreement (NAFTA), signed by Prime Minister Brian Mulroney, Mexican President Carlos Salinas and U.S. President George H.W. Bush, came into force on January 1, 1994. NAFTA has created economic growth and a rising standard of living for the people of the three member countries. By strengthening trade and investment rules and procedures across the continent, Nafta has proven to be a solid foundation for building Canada`s prosperity. NAFTA replaced Canada-U.S. Free Trade Agreement (CUFTA). Negotiations on CUFTA began in 1986 and the agreement entered into force on 1 January 1989.
The two nations agreed on a landmark agreement that put Canada and the United States at the forefront of trade liberalization. For more information, visit the Canada-U.S. Free Trade Agreement information page. The Trump administration`s office proposed the USMCA citing new measures for digital commerce, strengthening the protection of trade secrets and adapting the rules of origin of automobiles among the benefits of the trade agreement.  On May 30, U.S. Trade Representative Robert E. Lighthizer presented Congress with a draft statement on the administrative steps necessary to implement the U.S.-Mexico-Mexico-new NAFTA agreement, in accordance with the 2015 Presidential Trade Promotion Authority(TPA) Declaration of Administrative Action. The project will allow congress to be presented to Congress, after 30 days, on June 29, a law to implement the USMCA. In a letter  to Nancy Pelosi, House of Representatives spokeswoman Kevin McCarthy, the minority leader of the House of Representatives, the Republican, told Lighthizer that the USMCA was the gold standard in U.S. trade policy, modernizing the competitive trade in digital, intellectual property and services in the United States and creating a level playing field for U.S. businesses. , workers and farmers, an agreement that represents a fundamental shift in trade relations between Mexico and Mexico.
In addition, many economists argue that recent U.S. production problems have little to do with NAFTA and say that domestic production was under pressure decades before the contract. Surveys by David Autor, David Dorn and Gordon Hanson, published in 2016 [PDF], have shown that competition with China since 2001, when China joined the WTO, has had a much greater negative impact on U.S. employment. Hanson, an economist and trade expert at the University of California, San Diego (UCSD), says the biggest decline in manufacturing employment – between 17 million and 11 million between 2000 and 2010 – is mainly due to trade with China and underlying technological changes. «China is at the top of the list in terms of the impact on employment that we have seen since 2000, with technology being second and NAFTA much less important,» he says. The agreed text of the agreement was signed by the heads of state and government of the three countries on November 30, 2018, as an incidental event at the 2018 G20 summit in Buenos Aires, Argentina.  The English, Spanish and French versions will also be binding and the agreement will take effect after ratification by the three states through the adoption of enabling laws.
 The pact is Trump`s proxy for the North American Free Trade Agreement that came into force in 1994.