An April 2019 Analysis by the International Trade Commission on the likely effects of the USMCA estimated that the agreement would increase U.S. real GDP by 0.35 percent if the agreement were fully implemented (six years after ratification) and would increase total U.S. employment by 0.12% (176,000 jobs).   The analysis cited by another Congressional Research Service study showed that the agreement would not have a measurable effect on employment, wages or overall economic growth.  In the summer of 2019, Larry Kudlow, Trump`s chief economic adviser (the director of the National Economic Council at Trump White House), made unfounded statements about the likely economic impact of the agreement and overstated forecasts related to jobs and GDP growth.  The Trump administration`s office proposed the USMCA citing new digital trade measures, strengthening the protection of trade secrets and adapting the rules of origin of the automobile among the benefits of the trade agreement.  In addition, there is the provision that the agreement itself must be reviewed every six years by the three nations, with a 16-year forfeiture clause. The contract may be renewed for a period of 16 years during the six-year review period.  The introduction of the Sunset clause gives more control in the organization of the future of the USMCA in the hands of national governments. However, there is concern that this could lead to greater uncertainty.
Sectors such as automotive require significant investment in cross-border supply chains.  Given the dominant position of the U.S. consumer market, it is likely that this will put pressure on companies to establish more production in the United States, with a higher probability of higher production costs for these vehicles.  NAFTA has three primary dispute resolution mechanisms. Chapter 20 is the settlement mechanism for countries. It is often considered the least controversial of the three mechanisms, and has been maintained in its original form from NAFTA to the USMCA. In such cases, complaints filed by USMCA Member States against the duration of the contract would be violated.  In Chapter 19, the justifications for anti-dumping or countervailing duties are managed.
Without Chapter 19, the avenue of recourse for the management of these policies would be through the national legal system. Chapter 19 provides that an USMCA body hears the case and acts as an international commercial tribunal to arbitrate the dispute.  The Trump administration has attempted to remove Chapter 19 of the new USMCA text, which until now existed in the agreement. Growing objections within Member States to U.S. trade policy and various aspects of the USMCA have had an impact on the signing and ratification process. Mexico said it would not sign the USMCA if tariffs on steel and aluminum were maintained.  Based on the results of the November 6, 2018 U.S. election, it has been speculated that the greater power of Democrats in the House of Representatives could jeopardize the passage of the USMCA agreement.   Bill Pascrell, a senior Democrat, argued for changes to the USMCA to pass Congress.  Republicans have opposed the USMCA provisions that impose labour rights on LGBTQ and pregnant workers.
 Forty Republicans in Congress have asked Mr. Trump not to sign an agreement that includes “the unprecedented integration of sexual orientation and the language of gender identity.” As a result, Trump ultimately signed a revised version that required each nation only to “policies it deems appropriate to protect workers from discrimination in the workplace” and said the United States would not be required to introduce additional non-discrimination laws.  The Canadian government expressed concern about the changes that have occurred under the USMCA agreement.  Although the USMCA does not provide the specific format of a specific certificate of origin form, the specific data requirements required to enforce preferences are described.