Associated Press. “The Mexican Senate ratifies the amendments to the USMCA trade pact.” On December 19, 2019, the U.S. House of Representatives passed the USMCA with multiparty support by 385 votes (Democracy 193, Republican 192) to 41 (38 Democrats, Republicans 2, 1).  On January 16, 2020, the U.S. Senate passed the trade agreement by 89 votes (Democrats 38, Republicans 51) to 10 (Democracy 8, Republican 1, Independent 1) and the bill was forwarded to the White House for the signature of Donald Trump.  On January 29, 2020, Trump signed the agreement (Public Law No: 116-113).  NAFTA has been formally amended, but not the 1989 Canada-U.S. Free Trade Agreement, which is only “suspended.”   The USMCA is expected to have a very small impact on the economy.  An International Monetary Fund (IMF) discussion paper published at the end of March 2019 stated that the agreement would have a “negligible” impact on the general economy.   The IMF study predicted that the USMCA “would have a negative impact on trade in the automotive, textile and clothing sectors, while achieving modest welfare gains, mainly due to improved access to the goods market, with a negligible impact on real GDP.”  The IMF study concluded that the economic benefits of the USMCA would be greatly enhanced if Trump`s trade war ended (i.e., the United States lowering tariffs on imports of steel and aluminum from Canada and Mexico and that Canada and Mexico lower retaliatory duties on imports from the United States)  New traders entering the Mexican and Canadian markets will also benefit lower cost to reach consumers. Express delivery drivers in the United States, which carry many poor quality shipments for these distributors, are also benefiting from reduced costs and increased efficiency.
In addition to the original NAFTA provisions, the USMCA borrows significant credits under the Trans-Pacific Partnership (TPP) trade agreements and the Comprehensive and Progressive Agreement for the Trans-Pacific Partnership (CPTPP). On April 3, 2020, Mexico announced its willingness to implement the agreement and joined Canada.  The agreement came into force on July 1, 2020.    The agreement is the result of a renegotiation between member states of the North American Free Trade Agreement between 2017 and 2018, which formally approved the terms of the new agreement on 30 September 2018 and 1 October.  The USMCA was proposed by U.S. President Donald Trump and signed on November 30, 2018 by Trump, Mexican President Enrique Pea Nieto and Canadian Prime Minister Justin Trudeau as a secondary event of the 2018 G20 summit in Buenos Aires.