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It said the measures will have “a dramatic impact not only for dairy farmers but for the whole sector.”

“This has happened, despite assurances that our government would not sign a bad deal for Canadians,” Pierre Lampron, president of Dairy Farmers Canada, said in the statement. “We fail to see how this deal can be good for the 220,000 Canadian families that depend on dairy for their livelihood.”

U.S. administration officials said the deal provides increased access to Canada’s dairy market for U.S. producers and limits the American impact of Canada’s controversial supply management system for dairy and poultry products.

Photo by Michael Conroy/The Canadian Press/AP

Prime Minister Justin Trudeau would only say it was a “good day for Canada” as he left a late-night cabinet meeting in Ottawa that capped several days of frenetic long-distance talks that included Foreign Affairs Minister Chrystia Freeland and U.S. Ambassador David MacNaughton.

U.S President Donald Trump took to Twitter early Monday to praise what he called an “historic” deal that came just before U.S. and Mexican trade authorities were set to publish their own trade agreement without Canada as a signatory.

“It is a great deal for all three countries, solves the many deficiencies and mistakes in NAFTA, greatly opens markets to our farmers and manufacturers, reduces trade barriers to the U.S. and will bring all three great nations closer together in competition with the rest of the world,” he tweeted. “The USMCA is a historic transaction!”