Since the first negotiations, agriculture has been a controversial topic within NAFTA, as has been the case with almost all free trade agreements signed under the WTO. Agriculture was the only party that was not subject to trilateral negotiation; Three separate agreements have been signed between the two parties. The Canada-U.S. agreement provided for significant tariff restrictions and quotas for agricultural products (mainly sugar, dairy products and poultry products), while the Mexico-U.S. pact allowed for broader liberalization within a time frame (this was the first North-South free trade agreement for agriculture to be signed). [Clarification needed] Although President Donald Trump warned Canada on September 1 that he would exclude them from a new trade deal if Canada did not comply with its demands, it is not clear that the Trump administration has the power to do so without congressional approval. :34-6 According to reports by the Congressional Research Service (CRS), one was published in 2017 and another on July 26, 2018, it is likely that President Trump would need congressional approval for fundamental changes to NAFTA before the changes are implemented. :34-6 A Canadian-U.S. member The free trade agreement was concluded in 1988 and NAFTA extended the provisions of the agreement primarily to Mexico. NAFTA was negotiated by the governments of U.S. President George H.W. Bush, Canadian Prime Minister Brian Mulroney and Mexican Prime Minister Carlos Salinas de Gortari. An interim agreement on the pact was reached in August 1992 and signed by the three heads of state and government on 17 December.
NAFTA was ratified by the national parliaments of the three countries in 1993 and came into force on January 1, 1994. According to a 2018 Sierra Club report, Canada`s NAFTA and Paris Agreement commitments have been met. The Paris commitments were voluntary and NAFTA was mandatory.  NAFTA has increased Mexican agricultural exports to the United States, which have tripled since the implementation of the pact. Hundreds of thousands of jobs in the automotive industry have also been created in the country and most studies [PDF] have found that the agreement has increased productivity and reduced consumer prices in Mexico.