The uniform rules contain additional details on the rules of origin and origin of the agreement. UNITED STATES Canada Mexico On March 1, 2019, many organizations representing the agricultural sector in the United States announced their support for the USMCA and asked Congress to ratify the agreement. They also called on the Trump administration to continue to support NAFTA until the new trade agreement is ratified.  On March 4, House Ways and Means President Richard Neal predicted a ”very hard” path through Congress for the agreement.  Starting March 7, senior White House officials met with members of the Ways and Means House of Representatives, as well as moderate cackles from both parties, such as the Solver Caucus, the Tuesday Group and the Blue Dog Coalition, to seek ratification support. The Trump administration also withdrew from the threat to withdraw from NAFTA as negotiations with Congress continued.  In addition to the provisions of the original NAFTA, 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 Trump administration office proposed the USMCA citing new digital trade measures, strengthening the protection of trade secrets and adapting the rules of origin of the automobile as some of the benefits of the trade agreement.  On November 30, 2018, as planned, the USMCA was signed by all three parties at the G20 summit in Buenos Aires.   Disputes over labour rights, steel and aluminum prevented ratification of this version of the agreement.   Canadian Deputy Prime Minister Chrystia Freeland, U.S. Trade Representative Robert Lightizer, and Mexican Under-Secretary of State for North America Jesus Seade officially signed a revised agreement on December 10, 2019, ratified by the three countries on March 13, 2020. In a major concession to Democrats, the Trump administration has agreed to support some protective measures for a class of drugs called advanced and very expensive drug biologists. The final agreement nullifies a provision that, for ten years, provided protection for drugs from cheaper alternatives in both Canada and Mexico.