Mr. Trudeau and Canadian Foreign Minister Chrystia Freeland announced that they would join the agreement if it was in Canada`s interest.  Freeland returned prematurely from his diplomatic trip to Europe and cancelled a planned visit to Ukraine to participate in the NAFTA negotiations in Washington at the end of August, D.C.  According to an August 31 Canadian press, published in the Ottawa Citizen, key supply management topics, Chapter 19, drugs, cultural exemption, sunset clause and de minimis thresholds.  A 2015 study showed that Mexico`s prosperity increased by 1.31% as a result of NAFTA tariff reductions and by 118% for Mexico`s domestic trade.  Inequality and poverty have decreased in the regions of Mexico most affected by globalization.  Studies from 2013 and 2015 showed that Mexican small farmers benefited more from NAFTA than large farmers.   A 2007 study showed that nafta had “a significant impact on the volume of international trade, but a modest impact on prices and well-being.”  After the election of President Trump in 2016, support for NAFTA was highly polarized between Republicans and Democrats. Donald Trump has expressed a negative view of NAFTA, calling it “the worst trade deal ever adopted in this country.”  Republican support for NAFTA has grown from 43% in 2008 to 34% in 2017.
Meanwhile, Democrats` support for NAFTA has grown from 41 percent in 2008 to 71 percent in 2017.  Santorum, as a senator, was opposed to NAFTA and now speaks of a “trade war” with China. President Donald Trump cried as he promised to repeal NAFTA and other trade deals he considered unfair to the United States. On August 27, 2018, he announced a new trade agreement with Mexico, which is expected to replace it. The U.S.-Mexico trade agreement, as has been said, would maintain duty-free access for agricultural products on both sides of the border and eliminate non-tariff barriers, while encouraging more agricultural trade between Mexico and the United States and effectively replacing NAFTA. Nafta is essentially a customs agreement designed to facilitate trade and ensure that North American producers enjoy preferences over non-U.S., Canadian or Mexican products. According to the International Monetary Fund, trade between the three NAFTA countries more than tripled between 1993 and 2007. The OBJECTIVE of NAFTA was to remove barriers to trade and investment between the United States, Canada and Mexico. The implementation of NAFTA on January 1, 1994 resulted in the immediate removal of tariffs on more than half of Mexican exports to the United States and more than one-third of U.S. exports to Mexico. Within 10 years of the implementation of the agreement, all U.S.-Mexico tariffs should be eliminated, with the exception of some U.S. agricultural exports to Mexico, which are expected to expire within 15 years.
 Most of the trade between the United States and Canada was already duty-free. NAFTA also aimed to remove non-tariff barriers and protect intellectual property rights on marketed products. The North American Free Trade Agreement (NAFTA) is a treaty between the United States, Canada and Mexico that says it is prepared to remove barriers to trade between them. Among the features of NAFTA is the removal of tariffs on imports and exports between the three countries. However, other effects of NAFTA, such as the relocation of U.S. production jobs to Mexico, mean it is under negotiation. NAFTA is an agreement designed to facilitate trade and ensure that North American producers enjoy preferences over non-U.S., Canadian or Mexican products. The debate on the impact of NAFTA on its signatory countries continues.