Many critics of NAFTA saw the agreement as a radical experiment developed by influential multinationals who wanted to increase their profits at the expense of ordinary citizens of the countries concerned. Opposition groups argued that the horizontal rules imposed by nafta could undermine local governments by preventing them from enacting laws or regulations to protect the public interest. Critics also argued that the treaty would lead to a significant deterioration in environmental and health standards, promote privatization and deregulation of essential public services, and supplant family farmers in the signatory countries. The main provisions of NAFTA required a gradual reduction in tariffs, tariffs and other trade barriers between the three Member States, with some tariffs to be abolished immediately and others over a 15-year period. The agreement guaranteed duty-free access for a wide range of industrial products and goods traded between the signatories. “Domestic goods” have been granted to products imported from other NAFTA countries and prohibit all governments, local or provincial, from imposing taxes or tariffs on these products. Many small U.S. companies under NAFTA depended on exporting their products to Canada or Mexico. According to the U.S. Trade Representative, this trade has supported more than 140,000 small and medium-sized enterprises in the United States.
 The North American Free Trade Agreement (NAFTA); in Spanish: Tratado de Libre Comercio de América del Norte, TLCAN; In French: North American Free Trade Agreement, ALNA) was an agreement signed by Canada, Mexico and the United States, creating a trilateral trade bloc in North America. The agreement came into force on January 1, 1994 and replaced the 1988 Canada-U.S. Free Trade Agreement.  The NAFTA trading bloc was one of the largest trading blocs in the world, after the proceeds of the home. “The USMCA will provide our workers, farmers, ranchers and businesses with a quality trade agreement that will result in freer markets, fairer trade and robust economic growth in our region. It will strengthen the middle class and create good, well-paying jobs and new opportunities for the nearly half a billion people who call North America home. President Donald Trump cried as he promised to repeal NAFTA and other trade agreements 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.
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 automotive sectors would be most affected.   From the outset, critics of NAFTA feared that the agreement would result in a move of U.S. jobs to Mexico, despite the additional NAALC. NAFTA, for example, has affected thousands of U.S. auto workers in this way.