Second, NAFTA eliminated many tariffs on imports and exports between the three countries. Tariffs are taxes that are used to increase the cost of foreign goods. NAFTA has developed specific rules to regulate trade in agricultural products, motor vehicles and clothing. But the most important aspect for Canada – opening up its economy to the United States, by far Canada`s largest trading partner – was before NAFTA, when the Canadian United States came into force in 1989. Free Trade Agreement (CUSFTA). Total Canada-U.S. Trade rose rapidly in the wake of trade liberalization in Canada. After NAFTA, Canadian exports to the United States increased from [PDF] $110 billion to $346 billion; Imports from the United States increased almost as sharply. In 2008, Canadian exports to the United States and Mexico totaled $381.3 billion and imports $245.1 billion.  According to a 2004 paper by University of Toronto economist Daniel Trefler, NAFTA provided Canada with a significant net benefit in 2003, with long-term productivity increasing by up to 15 per cent in the sectors that experienced the largest tariff reductions.  While the decline in low-productivity jobs has reduced employment (up to 12 per cent of existing jobs), these job losses have lasted less than a decade; Overall, unemployment has declined in Canada since the legislation was passed.
Trefler commented on the compromise, saying that the crucial trade policy issue was “how free trade can be implemented in an industrialized economy so that the long-term benefits and short-term adjustment costs borne by workers and others are recognized.”  It is clear that NAFTA continues to improve political views on globalization and free trade in general. Opposition to NAFTA has intensified, making it much more politically difficult to adopt other similar free trade agreements. This became clear in the summer of 2005, when the Central American Free Trade Agreement (CAFTA) stopped in Congress because of a lack of support. Two journalists, Dawn Gilbertson and Jonathan J. Higuera, who wrote in the Arizona Republic on the tenth anniversary of NAFTA, summed it up this way: “The reality of NAFTA at 10 years old is this: a story of winners and losers, divided largely by the workplace and what we do.” The same goes for the impact of NAFTA on small businesses. For some, it was an opportunity to grow and for others it was a challenge. Maquiladoras (Mexican assembly plants that absorb imported components and produce goods for export) have become the emblem of trade in Mexico. They left the United States for Mexico, hence the debate about the loss of American jobs. Revenues in the maquiladora sector had increased by 15.5% since nafta in 1994.  Other sectors have also benefited from the free trade agreement and the share of non-cross-border exports to the United States has increased over the past five years [when?], while the share of exports from border states has declined. This has led to rapid growth in non-cross-border metropolitan areas such as Toluca, Leén and Puebla, all more populated than Tijuana, Ciudad Juérez and Reynosa.
After diplomatic negotiations in 1990, the heads of state and government of the three nations signed the agreement on 17 December 1992 in their respective capitals.  The signed agreement had to be ratified by each country`s legislative or parliamentary department. After Donald Trump`s presidential election, a number of trade experts said that exiting NAFTA, as Proposed by Trump, would have a number of unintended consequences for the United States, including limited access to the largest U.S. export markets, reduced economic growth and higher prices for gasoline, cars, fruits and vegetables.  The textile, agriculture and manufacturing sectors