In October 2017, in The Globe and Mail in Toronto, an op-ed questioned the U.S. willingness to renegotiate the agreement or whether it planned to do so, no matter what, and noted that the newly appointed U.S. Ambassador, Kelly Knight Craft, is married to the owner of Alliance Resource Partners, a major U.S. coal company. Canada is implementing a carbon plan, and it is also about selling bomber jets. “Americans used so many poison pills in last week`s conversations in Washington that they should have been charged with murder,” columnist John Ibbitson wrote.  It is impossible to isolate the effects of NAFTA on the larger economy. For example, it is difficult to say with certainty what percentage of the current U.S. trade deficit, which reached a record $65,677 million at the end of 2005, is directly attributable to NAFTA. It is also difficult to say what percentage of the 3.3 million manufacturing jobs that were lost in the United States between 1998 and 2004 is the result of NAFTA and what percentage would have been created without this trade agreement.
It cannot even be said with certainty that the intensification of trade between NAFTA countries is exclusively the result of the trade agreement. Those who support the agreement generally claim NAFTA loans for enhanced trade activity and reject the idea that the agreement has resulted in job losses or a growing trade deficit with Canada and Mexico ($8,039 million and $4,263 million respectively in December 2005). Critics of the agreement generally associate it with these deficits and job losses. Before sending it to the U.S. Senate, Clinton added two subsidiary agreements, the North American Agreement on Labor Cooperation (NAALC) and the North American Agreement on Environmental Cooperation (NAAEC) to protect workers and the environment, as well as to allay the concerns of many members of the House of Representatives. The United States has required its partners to comply with similar environmental practices and regulations. [Citation required] After much attention and discussion, the U.S. House of Representatives passed the North American Free Trade Agreement Implementation Act on November 17, 1993.
Supporters of the deal included 132 Republicans and 102 Democrats. The legislation passed the Senate on November 20, 1993, 61-38.  The Supporters of the Senate were 34 Republicans and 27 Democrats. Republican Congressman David Dreier of California, a staunch supporter of NAFTA since the Reagan administration, has played a leading role in mobilizing support for the agreement among Republicans in Congress and across the country.   In 1984, Congress passed the Trade and Tariff Act, which gave the president quick power to negotiate free trade agreements. He only allowed Congress to approve or disapprove of Congress, and he could not change the negotiating points. Neither the worst fears of Canadian trade opponents – that open trade would erode the country`s manufacturing sector – nor the highest hopes of NAFTA proponents – that this would lead to a rapid increase in productivity – have been realized. Employment in Canada`s manufacturing sector has remained stable, but the productivity gap between the Canadian and U.S. economies has not been closed: until 2017, Canada`s labour productivity remained at 72% of the U.S. level. 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.   The pact catalyzed Mexico`s transition from one of the world`s most protectionist economies to one of the most trade-free.