NAFTA has long been a political objective. In 2008, then-Presidential candidate Barack Obama responded to widespread trade skepticism within the Democratic base by promising to renegotiate NAFTA to incorporate stricter labor and environmental standards. The Obama administration tried to address NAFTA issues during the Trans-Pacific Partnership negotiations, a massive trade agreement with 11 other countries, including Canada and Mexico. The TPP was deeply unpopular – Hillary Clinton ultimately opposed the deal during her 2016 presidential bid – and President Trump withdrew the United States from the TPP in one of his first official acts. Supporting a 21st century economy through new measures to protect intellectual property in the United States and to secure trade opportunities for services in the United States. In early 2020, the U.S. Congress approved the USMCA with large bipartisan majorities in both chambers, and the agreement came into effect on July 1. Nevertheless, some critics have complained that the new rules of origin and minimum wage requirements are cumbersome and boil down to state-run exchanges. Alden of CFR was blood pressure and said that the government could recognize the restoration of cross-party cooperation in U.S. trade policy. But he warns: „If this new mix of Trump nationalism and democratic progressivism is what it takes now to conclude trade agreements with the United States, there could be very few buyers.“ The U.S.-Mexico agreement is based on the North American Free Trade Agreement (NAFTA), which originally came into force on January 1, 1994. The agreement under consideration was the result of more than a year of negotiations including possible U.S.
tariffs on Canada, in addition to the possibility of separate bilateral agreements.  On 10 December 2019, the three countries reached a revised USMCA agreement. On January 29, 2020, Deputy Prime Minister and Minister of Intergovernmental Affairs Chrystia Freeland introduced the USMCA C-4 Transposition Act in the House of Commons and passed the first reading without a registered vote. On February 6, the bill passed second reading in the House of Commons by 275 votes to 28, with the Bloc Québécois voting against and all other parties voting in its favour, and it was referred to the Standing Committee on International Trade.    On 27 February 2020, the committee voted to send the bill to Parliament for third reading, without amendments. Many workers and union leaders blame trade agreements such as NAFTA for declining employment in U.S. production. The U.S. auto sector has lost about 350,000 jobs – one-third of the industry – since 1994, while employment in Mexico`s auto sector has grown from 120,000 to 550,000. NAFTA has profoundly reshaped North American economic relations and encouraged unprecedented integration between Canada`s developed economies and the United States and Mexico`s developing countries.
In the United States, nafta originally enjoyed multi-party support; It was negotiated by Republican President George H.W. Bush, passed by a Democratic-controlled Congress and implemented under Democratic President Bill Clinton.