The business lobby group said there were "several poison pill proposals" put on the table by the USA that could tank the renegotiations.
"We'll see if we can do the kind of changes that we need", he said.
President Donald Trump's trade negotiators entered the latest round of NAFTA talks Wednesday under growing pressure inside their own country to step back from a confrontational stance that's left the USA isolated at the negotiating table.
"I highlighted to the president how we disagreed, vehemently, with Commerce's decision to bring in countervailing and anti-dumping duties against Bombardier", Trudeau told reporters following talks with US President Donald Trump.
Asked during his appearance with Trudeau whether NAFTA was dead, Trump said, "We'll see what happens".
The conversation about possibly dissolving NAFTA has become increasingly frequent over the last month, both by officials from member countries and by prominent figures of the private sector, whose investments often rely on the outcome of renegotiations.
The prime minister arrives in Mexico looking for a friendly ear in President Enrique Pena Nieto, himself no stranger to hostility from the Trump administration, who will receive Trudeau at the presidential palace with military honors.
Trump and Trudeau met as negotiators from the three NAFTA countries gathered in the Washington suburb of Arlington to get the next round of trade talks under way.
Britain could join a formal trade alliance with the United States, Canada and Mexico if the European Union refuses to clinch a post-Brexit trade deal, the Daily Telegraph newspaper reported on Tuesday.
The former House speaker and friend of the president says a deal will eventually be reached, after long and hard negotiations. "We can have that discussion, but I really do think it won't be Mexico and Canada that are pushing back against the secretary, it will be a lot of Americans".
The part supplier group said Thursday that USA automakers would be at a disadvantage if they face higher tariffs than their counterparts in other countries outside of North America do.
The U.S. Chamber of Commerce has warned against so-called "poison pill" proposals by the U.S., including the sunset clause.
Oil prices have suffered from data released late Wednesday by the American Petroleum Institute (API) showing a surprise build in United States crude inventories and gained little from a report by the International Energy Agency, released Thursday, suggesting the global oil market will be in balance next year despite rising output. "Any trade proposal that makes multinational corporations nervous is a good sign that it's moving in the right direction for workers". "We have always understood that draining the swamp would be controversial in Washington".