On September 30, 2018, the deadline for negotiations between Canada and the United States, a preliminary agreement was reached between the two countries, thus obtaining the trilateral pact when the Trump administration submits the agreement to Congress.  The new name of the agreement was “United States-Mexico-Canada Agreement” (USMCA) and entered into force on July 1, 2020.   An “ancillary agreement” concluded in August 1993 to enforce existing national labour law, the North American Labour Cooperation Agreement (NAALC) , was severely limited. The USMCA secured stronger enforcement mechanisms than the original agreement, leading the AFL-CIO, the largest collection of U.S. unions, to back the pact, a rare endorsement of a group that has sharply criticized NAFTA. Before sending it to the U.S. Senate, Clinton added two side agreements, the North American Agreement on Labor Cooperation (NAALC) and the North American Agreement on Environmental Cooperation (NAAEC), to protect workers and the environment and allay the concerns of many members of the House of Representatives. The United States required its partners to comply with environmental practices and regulations similar to its own. [Citation required] After much emotional reflection and discussion, the U.S. House of Representatives passed the North American Free Trade Agreement Act (234-200) on November 17, 1993. Among the supporters of the deal were 132 Republicans and 102 Democrats. The law passed the Senate on 20 November 1993 with 61 to 38.
 The Senate supporters were 34 Republicans and 27 Democrats. California Republican Congressman David Dreier, a staunch supporter of NAFTA since the Reagan administration, has played a leading role in mobilizing support for the Republican deal in Congress and across the country.   Controversy over the treaty`s environmental provisions remained strong in the late 1990s. Indeed, North American trade interests have attempted to weaken an important NAFTA secondary agreement on environmental protection and enforcement. This agreement – one of the few provisions welcomed by environmental groups – allows groups and ordinary citizens to accuse Member States of failing to enforce their own environmental laws. A trinational commission for environmental cooperation is responsible for investigating these allegations and making reports public. .