Short answers, pulled from the story.
The North American Free Trade Agreement officially came into force on the 1st of January 1994. This date marked the beginning of the world's largest trade bloc by gross domestic product. The agreement brought together the United States, Canada, and Mexico to eliminate tariffs on more than half of Mexico's exports to the United States and over one-third of U.S. exports to Mexico within the first year.
George H. W. Bush, Carlos Salinas de Gortari, and Brian Mulroney signed the North American Free Trade Agreement on the 17th of December 1992. This trilateral pact followed the 1988 Canada-United States Free Trade Agreement and set the stage for the economic union. The agreement was the culmination of a political journey that began with Ronald Reagan's 1980 presidential campaign.
The North American Free Trade Agreement included the North American Agreement on Labor Cooperation and the North American Agreement on Environmental Cooperation as side agreements. These agreements were added to address concerns about worker rights and environmental standards. The U.S. House of Representatives passed the NAFTA Implementation Act on the 17th of November 1993, and the Senate followed suit on the 20th of November 1993.
The North American Free Trade Agreement was blamed for sending 700,000 American manufacturing jobs to Mexico between 1993 and 2011. While the agreement increased trade in goods and services with Canada and Mexico from $337 billion in 1993 to $1.2 trillion in 2011, the Congressional Research Service concluded that the net overall effect on the U.S. economy was relatively modest. The agreement also contributed to wealth inequality and a 14% decrease in the real average wage of minimum wage workers in the first six years.
The United States-Mexica-Canada Agreement replaced the North American Free Trade Agreement on the 1st of July 2020. The United States, Mexico, and Canada reached an agreement to replace NAFTA in September 2018, and all three countries ratified the new deal by March 2020. The new agreement included provisions to boost automobile production in the U.S. and raised the minimum wage for workers in the automotive industry to $16 per hour.