In a rare piece of good news for global trade, the two countries announced overnight that they had reached an agreement after months of talks.
Wisconsin's Grassland Dairy blamed the policy for lost sales which the processor said forced it to cut milk contracts for dozens of state farmers last spring.
A senior U.S. administration official said the final rewrite is a "fantastic agreement" and he called it "a big win for the United States, Mexico and Canada".
USA lawmakers and business have urged the administration to keep Canada in the deal but the trilateral nature had been in jeopardy after Trump on August 27 announced he reached a deal with Mexico that Canada could join if it's willing to make concessions.
US President Donald Trump and Canadian Prime Minister Justin Trudeau during a meeting in June.
Meghan Markle delighted when fan praises her mom Doria Ragland
Harry kept his cool in an understated pale grey suit which he dressed down by wearing his shirt open and opting not to wear a tie. Harry told the group it was "fantastic" they were sharing personal experiences in order to help others who may need support.
Trump said the tariffs would remain in place "until such time as we can do something that would be different, like quotas perhaps, so that our industry is protected".
The threat of tariffs has brought India to the negotiating table and Trump said he's confident other countries, too. "We'll get rid of the name NAFTA", he told the press, because it "had a bad connotation because the United States was hurt very badly by NAFTA for many years". If approved by all three countries it will replace the 24-year-old North American Free Trade Agreement.
The President said he plans to sign the deal by the end of November.
The main goal of the agreement for the United States is to have more auto and truck parts made in North America.
U.S. Trade Representative Robert Lighthizer and White House adviser Jared Kushner have been updating Trump throughout Sunday on the talks, a U.S. source said. "Our companies won't be leaving the United States, firing their workers and building their cars elsewhere".
According to the WCIT, exports from Washington into Mexico have increased 700 percent and exports to Canada grew to 200 percent since NAFTA was implemented in 1994.
He said it was too soon to talk to China about trade deal and said it was "privilege" for other countries to trade with the USA and for them "to come in and attack the piggy bank".